diff --git a/tests/unit/admin/test_routes.py b/tests/unit/admin/test_routes.py
index ab481bf4cd75..1b1fa30ebcbd 100644
--- a/tests/unit/admin/test_routes.py
+++ b/tests/unit/admin/test_routes.py
@@ -248,6 +248,20 @@ def test_includeme():
             traverse="/{project_name}",
             domain=warehouse,
         ),
+        pretend.call(
+            "admin.project.archive",
+            "/admin/projects/{project_name}/archive/",
+            factory="warehouse.packaging.models:ProjectFactory",
+            traverse="/{project_name}",
+            domain=warehouse,
+        ),
+        pretend.call(
+            "admin.project.unarchive",
+            "/admin/projects/{project_name}/unarchive/",
+            factory="warehouse.packaging.models:ProjectFactory",
+            traverse="/{project_name}",
+            domain=warehouse,
+        ),
         pretend.call("admin.journals.list", "/admin/journals/", domain=warehouse),
         pretend.call(
             "admin.prohibited_project_names.list",
diff --git a/tests/unit/admin/views/test_projects.py b/tests/unit/admin/views/test_projects.py
index 47c17b064b50..918fe09ef33e 100644
--- a/tests/unit/admin/views/test_projects.py
+++ b/tests/unit/admin/views/test_projects.py
@@ -26,7 +26,7 @@
 from tests.common.db.oidc import GitHubPublisherFactory
 from warehouse.admin.views import projects as views
 from warehouse.observations.models import ObservationKind
-from warehouse.packaging.models import Project, Role
+from warehouse.packaging.models import LifecycleStatus, Project, Role
 from warehouse.packaging.tasks import update_release_description
 from warehouse.search.tasks import reindex_project
 from warehouse.utils.paginate import paginate_url_factory
@@ -952,3 +952,96 @@ def test_reindexes_project(self, db_request):
         assert db_request.session.flash.calls == [
             pretend.call("Task sent to reindex the project 'foo'", queue="success")
         ]
+
+
+class TestProjectArchival:
+    def test_archive(self, db_request):
+        project = ProjectFactory.create(name="foo")
+        user = UserFactory.create(username="testuser")
+
+        db_request.route_path = pretend.call_recorder(lambda *a, **kw: "/the-redirect")
+        db_request.method = "POST"
+        db_request.user = user
+        db_request.session = pretend.stub(
+            flash=pretend.call_recorder(lambda *a, **kw: None)
+        )
+
+        result = views.archive_project_view(project, db_request)
+
+        assert isinstance(result, HTTPSeeOther)
+        assert result.headers["Location"] == "/the-redirect"
+        assert project.lifecycle_status == LifecycleStatus.Archived
+        assert db_request.route_path.calls == [
+            pretend.call("admin.project.detail", project_name=project.name)
+        ]
+
+    def test_unarchive_project(self, db_request):
+        project = ProjectFactory.create(
+            name="foo", lifecycle_status=LifecycleStatus.Archived
+        )
+        user = UserFactory.create(username="testuser")
+
+        db_request.route_path = pretend.call_recorder(lambda *a, **kw: "/the-redirect")
+        db_request.method = "POST"
+        db_request.user = user
+        db_request.session = pretend.stub(
+            flash=pretend.call_recorder(lambda *a, **kw: None)
+        )
+
+        result = views.unarchive_project_view(project, db_request)
+
+        assert isinstance(result, HTTPSeeOther)
+        assert result.headers["Location"] == "/the-redirect"
+        assert db_request.route_path.calls == [
+            pretend.call("admin.project.detail", project_name=project.name)
+        ]
+        assert project.lifecycle_status is None
+
+    def test_disallowed_archive(self, db_request):
+        project = ProjectFactory.create(name="foo", lifecycle_status="quarantine-enter")
+        user = UserFactory.create(username="testuser")
+
+        db_request.route_path = pretend.call_recorder(lambda *a, **kw: "/the-redirect")
+        db_request.method = "POST"
+        db_request.user = user
+        db_request.session = pretend.stub(
+            flash=pretend.call_recorder(lambda *a, **kw: None)
+        )
+
+        result = views.archive_project_view(project, db_request)
+
+        assert isinstance(result, HTTPSeeOther)
+        assert result.headers["Location"] == "/the-redirect"
+        assert db_request.session.flash.calls == [
+            pretend.call(
+                f"Cannot archive project with status {project.lifecycle_status}",
+                queue="error",
+            )
+        ]
+        assert db_request.route_path.calls == [
+            pretend.call("admin.project.detail", project_name="foo")
+        ]
+        assert project.lifecycle_status == "quarantine-enter"
+
+    def test_disallowed_unarchive(self, db_request):
+        project = ProjectFactory.create(name="foo", lifecycle_status="quarantine-enter")
+        user = UserFactory.create(username="testuser")
+
+        db_request.route_path = pretend.call_recorder(lambda *a, **kw: "/the-redirect")
+        db_request.method = "POST"
+        db_request.user = user
+        db_request.session = pretend.stub(
+            flash=pretend.call_recorder(lambda *a, **kw: None)
+        )
+
+        result = views.unarchive_project_view(project, db_request)
+
+        assert isinstance(result, HTTPSeeOther)
+        assert result.headers["Location"] == "/the-redirect"
+        assert db_request.session.flash.calls == [
+            pretend.call("Can only unarchive an archived project", queue="error")
+        ]
+        assert db_request.route_path.calls == [
+            pretend.call("admin.project.detail", project_name="foo")
+        ]
+        assert project.lifecycle_status == "quarantine-enter"
diff --git a/tests/unit/manage/test_views.py b/tests/unit/manage/test_views.py
index 07b6c9f0d969..b7ebeaa3a40f 100644
--- a/tests/unit/manage/test_views.py
+++ b/tests/unit/manage/test_views.py
@@ -63,6 +63,7 @@
 from warehouse.packaging.models import (
     File,
     JournalEntry,
+    LifecycleStatus,
     Project,
     Release,
     Role,
@@ -2602,7 +2603,7 @@ class TestManageProjectSettings:
     @pytest.mark.parametrize("enabled", [False, True])
     def test_manage_project_settings(self, enabled, monkeypatch):
         request = pretend.stub(organization_access=enabled)
-        project = pretend.stub(organization=None)
+        project = pretend.stub(organization=None, lifecycle_status=None)
         view = views.ManageProjectSettingsViews(project, request)
         form = pretend.stub()
         view.transfer_organization_project_form_class = lambda *a, **kw: form
@@ -2629,7 +2630,7 @@ def test_manage_project_settings_in_organization_managed(self, monkeypatch):
         request = pretend.stub(organization_access=True)
         organization_managed = pretend.stub(name="managed-org", is_active=True)
         organization_owned = pretend.stub(name="owned-org", is_active=True)
-        project = pretend.stub(organization=organization_managed)
+        project = pretend.stub(organization=organization_managed, lifecycle_status=None)
         view = views.ManageProjectSettingsViews(project, request)
         form = pretend.stub()
         view.transfer_organization_project_form_class = pretend.call_recorder(
@@ -2661,7 +2662,7 @@ def test_manage_project_settings_in_organization_owned(self, monkeypatch):
         request = pretend.stub(organization_access=True)
         organization_managed = pretend.stub(name="managed-org", is_active=True)
         organization_owned = pretend.stub(name="owned-org", is_active=True)
-        project = pretend.stub(organization=organization_owned)
+        project = pretend.stub(organization=organization_owned, lifecycle_status=None)
         view = views.ManageProjectSettingsViews(project, request)
         form = pretend.stub()
         view.transfer_organization_project_form_class = pretend.call_recorder(
@@ -7955,3 +7956,96 @@ def test_delete_oidc_publisher_admin_disabled(self, monkeypatch):
                 queue="error",
             )
         ]
+
+
+class TestArchiveProject:
+    def test_archive(self, db_request):
+        project = ProjectFactory.create(name="foo")
+        user = UserFactory.create(username="testuser")
+
+        db_request.route_path = pretend.call_recorder(lambda *a, **kw: "/the-redirect")
+        db_request.method = "POST"
+        db_request.user = user
+        db_request.session = pretend.stub(
+            flash=pretend.call_recorder(lambda *a, **kw: None)
+        )
+
+        result = views.archive_project_view(project, db_request)
+
+        assert isinstance(result, HTTPSeeOther)
+        assert result.headers["Location"] == "/the-redirect"
+        assert project.lifecycle_status == LifecycleStatus.Archived
+        assert db_request.route_path.calls == [
+            pretend.call("manage.project.settings", project_name=project.name)
+        ]
+
+    def test_unarchive_project(self, db_request):
+        project = ProjectFactory.create(
+            name="foo", lifecycle_status=LifecycleStatus.Archived
+        )
+        user = UserFactory.create(username="testuser")
+
+        db_request.route_path = pretend.call_recorder(lambda *a, **kw: "/the-redirect")
+        db_request.method = "POST"
+        db_request.user = user
+        db_request.session = pretend.stub(
+            flash=pretend.call_recorder(lambda *a, **kw: None)
+        )
+
+        result = views.unarchive_project_view(project, db_request)
+
+        assert isinstance(result, HTTPSeeOther)
+        assert result.headers["Location"] == "/the-redirect"
+        assert db_request.route_path.calls == [
+            pretend.call("manage.project.settings", project_name=project.name)
+        ]
+        assert project.lifecycle_status is None
+
+    def test_disallowed_archive(self, db_request):
+        project = ProjectFactory.create(name="foo", lifecycle_status="quarantine-enter")
+        user = UserFactory.create(username="testuser")
+
+        db_request.route_path = pretend.call_recorder(lambda *a, **kw: "/the-redirect")
+        db_request.method = "POST"
+        db_request.user = user
+        db_request.session = pretend.stub(
+            flash=pretend.call_recorder(lambda *a, **kw: None)
+        )
+
+        result = views.archive_project_view(project, db_request)
+
+        assert isinstance(result, HTTPSeeOther)
+        assert result.headers["Location"] == "/the-redirect"
+        assert db_request.session.flash.calls == [
+            pretend.call(
+                f"Cannot archive project with status {project.lifecycle_status}",
+                queue="error",
+            )
+        ]
+        assert db_request.route_path.calls == [
+            pretend.call("manage.project.settings", project_name="foo")
+        ]
+        assert project.lifecycle_status == "quarantine-enter"
+
+    def test_disallowed_unarchive(self, db_request):
+        project = ProjectFactory.create(name="foo", lifecycle_status="quarantine-enter")
+        user = UserFactory.create(username="testuser")
+
+        db_request.route_path = pretend.call_recorder(lambda *a, **kw: "/the-redirect")
+        db_request.method = "POST"
+        db_request.user = user
+        db_request.session = pretend.stub(
+            flash=pretend.call_recorder(lambda *a, **kw: None)
+        )
+
+        result = views.unarchive_project_view(project, db_request)
+
+        assert isinstance(result, HTTPSeeOther)
+        assert result.headers["Location"] == "/the-redirect"
+        assert db_request.session.flash.calls == [
+            pretend.call("Can only unarchive an archived project", queue="error")
+        ]
+        assert db_request.route_path.calls == [
+            pretend.call("manage.project.settings", project_name="foo")
+        ]
+        assert project.lifecycle_status == "quarantine-enter"
diff --git a/tests/unit/packaging/test_models.py b/tests/unit/packaging/test_models.py
index aac3cc37433b..8a80d58129e2 100644
--- a/tests/unit/packaging/test_models.py
+++ b/tests/unit/packaging/test_models.py
@@ -365,6 +365,99 @@ def test_acl_for_quarantined_project(self, db_session):
             key=lambda x: x[1],
         )
 
+    def test_acl_for_archived_project(self, db_session):
+        """
+        If a Project is archived, the Project ACL should disallow uploads.
+        """
+        project = DBProjectFactory.create(lifecycle_status="archived")
+        owner1 = DBRoleFactory.create(project=project)
+        owner2 = DBRoleFactory.create(project=project)
+
+        # Maintainers should not appear in the ACLs, since they only have
+        # upload permissions, and archived projects don't allow upload
+        DBRoleFactory.create_batch(2, project=project, role_name="Maintainer")
+
+        organization = DBOrganizationFactory.create()
+        owner3 = DBOrganizationRoleFactory.create(organization=organization)
+        DBOrganizationProjectFactory.create(organization=organization, project=project)
+
+        team = DBTeamFactory.create()
+        owner4 = DBTeamRoleFactory.create(team=team)
+        DBTeamProjectRoleFactory.create(
+            team=team, project=project, role_name=TeamProjectRoleType.Owner
+        )
+
+        # Publishers should not appear in the ACLs, since they only have upload
+        # permissions, and archived projects don't allow upload
+        GitHubPublisherFactory.create(projects=[project])
+
+        acls = []
+        for location in lineage(project):
+            try:
+                acl = location.__acl__
+            except AttributeError:
+                continue
+
+            if acl and callable(acl):
+                acl = acl()
+
+            acls.extend(acl)
+
+        _perms_read_and_write = [
+            Permissions.ProjectsRead,
+            Permissions.ProjectsWrite,
+        ]
+        assert acls == [
+            (
+                Allow,
+                "group:admins",
+                (
+                    Permissions.AdminDashboardSidebarRead,
+                    Permissions.AdminObservationsRead,
+                    Permissions.AdminObservationsWrite,
+                    Permissions.AdminProhibitedProjectsWrite,
+                    Permissions.AdminProhibitedUsernameWrite,
+                    Permissions.AdminProjectsDelete,
+                    Permissions.AdminProjectsRead,
+                    Permissions.AdminProjectsSetLimit,
+                    Permissions.AdminProjectsWrite,
+                    Permissions.AdminRoleAdd,
+                    Permissions.AdminRoleDelete,
+                ),
+            ),
+            (
+                Allow,
+                "group:moderators",
+                (
+                    Permissions.AdminDashboardSidebarRead,
+                    Permissions.AdminObservationsRead,
+                    Permissions.AdminObservationsWrite,
+                    Permissions.AdminProjectsRead,
+                    Permissions.AdminProjectsSetLimit,
+                    Permissions.AdminRoleAdd,
+                    Permissions.AdminRoleDelete,
+                ),
+            ),
+            (
+                Allow,
+                "group:observers",
+                Permissions.APIObservationsAdd,
+            ),
+            (
+                Allow,
+                Authenticated,
+                Permissions.SubmitMalwareObservation,
+            ),
+        ] + sorted(
+            [
+                (Allow, f"user:{owner1.user.id}", _perms_read_and_write),
+                (Allow, f"user:{owner2.user.id}", _perms_read_and_write),
+                (Allow, f"user:{owner3.user.id}", _perms_read_and_write),
+                (Allow, f"user:{owner4.user.id}", _perms_read_and_write),
+            ],
+            key=lambda x: x[1],
+        )
+
     def test_repr(self, db_request):
         project = DBProjectFactory()
         assert isinstance(repr(project), str)
diff --git a/tests/unit/test_routes.py b/tests/unit/test_routes.py
index 0de9e3f61694..5377dc445eed 100644
--- a/tests/unit/test_routes.py
+++ b/tests/unit/test_routes.py
@@ -493,6 +493,20 @@ def add_redirect_rule(*args, **kwargs):
             traverse="/{project_name}",
             domain=warehouse,
         ),
+        pretend.call(
+            "manage.project.archive",
+            "/manage/project/{project_name}/archive/",
+            factory="warehouse.packaging.models:ProjectFactory",
+            traverse="/{project_name}",
+            domain=warehouse,
+        ),
+        pretend.call(
+            "manage.project.unarchive",
+            "/manage/project/{project_name}/unarchive/",
+            factory="warehouse.packaging.models:ProjectFactory",
+            traverse="/{project_name}",
+            domain=warehouse,
+        ),
         pretend.call(
             "manage.project.history",
             "/manage/project/{project_name}/history/",
diff --git a/warehouse/admin/routes.py b/warehouse/admin/routes.py
index 0f8b941d7599..fe7bdae93635 100644
--- a/warehouse/admin/routes.py
+++ b/warehouse/admin/routes.py
@@ -252,6 +252,20 @@ def includeme(config):
         traverse="/{project_name}",
         domain=warehouse,
     )
+    config.add_route(
+        "admin.project.archive",
+        "/admin/projects/{project_name}/archive/",
+        factory="warehouse.packaging.models:ProjectFactory",
+        traverse="/{project_name}",
+        domain=warehouse,
+    )
+    config.add_route(
+        "admin.project.unarchive",
+        "/admin/projects/{project_name}/unarchive/",
+        factory="warehouse.packaging.models:ProjectFactory",
+        traverse="/{project_name}",
+        domain=warehouse,
+    )
 
     # Journal related Admin pages
     config.add_route("admin.journals.list", "/admin/journals/", domain=warehouse)
diff --git a/warehouse/admin/templates/admin/projects/detail.html b/warehouse/admin/templates/admin/projects/detail.html
index 77e6d2b035a8..89778d0004ad 100644
--- a/warehouse/admin/templates/admin/projects/detail.html
+++ b/warehouse/admin/templates/admin/projects/detail.html
@@ -96,6 +96,27 @@ <h4 class="modal-title">Remove Project from Quarantine</h4>
   </div>
   <!-- /.modal -->
 
+  {% elif project.lifecycle_status == 'archived' %}
+    <div class="card card-info">
+      <div class="card-header">
+        <h3 class="card-title">
+          <i class="icon fas fa-info-circle"></i> Archived
+        </h3>
+        <div class="card-tools">
+          <span class="time">
+            <i class="fas fa-clock"></i> <time datetime="{{ project.lifecycle_status_changed }}" title="{{ project.lifecycle_status_changed }}">{{ project.lifecycle_status_changed }}</time>
+          </span>
+        </div>
+      </div>
+      <div class="card-body">
+        <p>
+          This project is archived.
+          It should not allow any new uploads unless it's unarchived.
+        </p>
+      </div>
+    </div>
+    <!-- .card -->
+
   {% endif %}
 
 <div class="card card-primary" id="attributes">
@@ -582,6 +603,33 @@ <h3 class="card-title">Prohibit Project Name</h3>
   </div>
 </form> <!-- .card #prohibitedProjectName -->
 
+<div class="card card-warning card-outline collapsed-card" id="archivedProjectName">
+  <div class="card-header">
+    <h3 class="card-title">Archive project</h3>
+    <div class="card-tools">
+      <button type="button" class="btn btn-tool" data-card-widget="collapse"><i class="fas fa-plus"></i>
+      </button>
+    </div>
+  </div>
+
+  <div class="card-footer">
+    {% set can_be_archived = not project.lifecycle_status or project.lifecycle_status == "quarantine-exit" %}
+    {% set can_be_unarchived = project.lifecycle_status == "archived" %}
+    <form method="POST" action="{{ request.route_path('admin.project.unarchive', project_name=project.name) }}">
+      <input name="csrf_token" type="hidden" value="{{ request.session.get_csrf_token() }}">
+      <div class="float-right">
+        <button type="submit" class="btn btn-primary" title="{{ 'Unarchiving requires superuser privileges' if not request.has_permission(Permissions.AdminProjectsWrite) }}" {{ "disabled" if not request.has_permission(Permissions.AdminProjectsWrite) or not can_be_unarchived }}>Unarchive</button>
+      </div>
+    </form>
+    <form method="POST" action="{{ request.route_path('admin.project.archive', project_name=project.name) }}">
+      <input name="csrf_token" type="hidden" value="{{ request.session.get_csrf_token() }}">
+      <div class="float-right">
+        <button type="submit" class="btn btn-primary" title="{{ 'Archiving requires superuser privileges' if not request.has_permission(Permissions.AdminProjectsWrite) }}" {{ "disabled" if not request.has_permission(Permissions.AdminProjectsWrite) or not can_be_archived}}>Archive</button>
+      </div>
+    </form>
+  </div>
+</div>
+
 <!-- Deletion form -->
 {% include 'delete.html' %}
 
diff --git a/warehouse/admin/views/projects.py b/warehouse/admin/views/projects.py
index 07f5ada3ede2..dfa1f797df38 100644
--- a/warehouse/admin/views/projects.py
+++ b/warehouse/admin/views/projects.py
@@ -30,9 +30,11 @@
 from warehouse.search.tasks import reindex_project as _reindex_project
 from warehouse.utils.paginate import paginate_url_factory
 from warehouse.utils.project import (
+    archive_project,
     clear_project_quarantine,
     confirm_project,
     remove_project,
+    unarchive_project,
 )
 
 UPLOAD_LIMIT_CAP = ONE_GIB
@@ -737,3 +739,37 @@ def reindex_project(project, request):
     return HTTPSeeOther(
         request.route_path("admin.project.detail", project_name=project.normalized_name)
     )
+
+
+@view_config(
+    route_name="admin.project.archive",
+    permission=Permissions.AdminProjectsWrite,
+    context=Project,
+    uses_session=True,
+    require_methods=["POST"],
+)
+def archive_project_view(project, request) -> HTTPSeeOther:
+    """
+    Archive a Project. Reversible action.
+    """
+    archive_project(project, request)
+    return HTTPSeeOther(
+        request.route_path("admin.project.detail", project_name=project.name)
+    )
+
+
+@view_config(
+    route_name="admin.project.unarchive",
+    permission=Permissions.AdminProjectsWrite,
+    context=Project,
+    uses_session=True,
+    require_methods=["POST"],
+)
+def unarchive_project_view(project, request) -> HTTPSeeOther:
+    """
+    Unarchive a Project. Reversible action.
+    """
+    unarchive_project(project, request)
+    return HTTPSeeOther(
+        request.route_path("admin.project.detail", project_name=project.name)
+    )
diff --git a/warehouse/events/tags.py b/warehouse/events/tags.py
index 61e3161c8e37..22eaaaec92f9 100644
--- a/warehouse/events/tags.py
+++ b/warehouse/events/tags.py
@@ -124,6 +124,8 @@ class Project(EventTagEnum):
         OrganizationProjectRemove = "project:organization_project:remove"
         OwnersRequire2FADisabled = "project:owners_require_2fa:disabled"
         OwnersRequire2FAEnabled = "project:owners_require_2fa:enabled"
+        ProjectArchiveEnter = "project:archive:enter"
+        ProjectArchiveExit = "project:archive:exit"
         ProjectCreate = "project:create"
         ProjectQuarantineEnter = "project:quarantine:enter"
         ProjectQuarantineExit = "project:quarantine:exit"
diff --git a/warehouse/locale/messages.pot b/warehouse/locale/messages.pot
index f8f88a3c4257..1a6081502f95 100644
--- a/warehouse/locale/messages.pot
+++ b/warehouse/locale/messages.pot
@@ -152,7 +152,7 @@ msgstr ""
 msgid "Successful WebAuthn assertion"
 msgstr ""
 
-#: warehouse/accounts/views.py:609 warehouse/manage/views/__init__.py:871
+#: warehouse/accounts/views.py:609 warehouse/manage/views/__init__.py:877
 msgid "Recovery code accepted. The supplied code cannot be used again."
 msgstr ""
 
@@ -286,7 +286,7 @@ msgid "You are now ${role} of the '${project_name}' project."
 msgstr ""
 
 #: warehouse/accounts/views.py:1588 warehouse/accounts/views.py:1831
-#: warehouse/manage/views/__init__.py:1407
+#: warehouse/manage/views/__init__.py:1413
 msgid ""
 "Trusted publishing is temporarily disabled. See https://pypi.org/help"
 "#admin-intervention for details."
@@ -306,19 +306,19 @@ msgstr ""
 msgid "You can't register more than 3 pending trusted publishers at once."
 msgstr ""
 
-#: warehouse/accounts/views.py:1654 warehouse/manage/views/__init__.py:1576
-#: warehouse/manage/views/__init__.py:1689
-#: warehouse/manage/views/__init__.py:1801
-#: warehouse/manage/views/__init__.py:1911
+#: warehouse/accounts/views.py:1654 warehouse/manage/views/__init__.py:1582
+#: warehouse/manage/views/__init__.py:1695
+#: warehouse/manage/views/__init__.py:1807
+#: warehouse/manage/views/__init__.py:1917
 msgid ""
 "There have been too many attempted trusted publisher registrations. Try "
 "again later."
 msgstr ""
 
-#: warehouse/accounts/views.py:1665 warehouse/manage/views/__init__.py:1590
-#: warehouse/manage/views/__init__.py:1703
-#: warehouse/manage/views/__init__.py:1815
-#: warehouse/manage/views/__init__.py:1925
+#: warehouse/accounts/views.py:1665 warehouse/manage/views/__init__.py:1596
+#: warehouse/manage/views/__init__.py:1709
+#: warehouse/manage/views/__init__.py:1821
+#: warehouse/manage/views/__init__.py:1931
 msgid "The trusted publisher could not be registered"
 msgstr ""
 
@@ -446,161 +446,161 @@ msgid ""
 "less."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:283
+#: warehouse/manage/views/__init__.py:289
 msgid "Account details updated"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:313
+#: warehouse/manage/views/__init__.py:319
 msgid "Email ${email_address} added - check your email for a verification link"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:819
+#: warehouse/manage/views/__init__.py:825
 msgid "Recovery codes already generated"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:820
+#: warehouse/manage/views/__init__.py:826
 msgid "Generating new recovery codes will invalidate your existing codes."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:929
+#: warehouse/manage/views/__init__.py:935
 msgid "Verify your email to create an API token."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1029
+#: warehouse/manage/views/__init__.py:1035
 msgid "API Token does not exist."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1061
+#: warehouse/manage/views/__init__.py:1067
 msgid "Invalid credentials. Try again"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1180
+#: warehouse/manage/views/__init__.py:1186
 msgid "Invalid alternate repository location details"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1217
+#: warehouse/manage/views/__init__.py:1223
 msgid "Added alternate repository '${name}'"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1251
-#: warehouse/manage/views/__init__.py:2258
-#: warehouse/manage/views/__init__.py:2343
-#: warehouse/manage/views/__init__.py:2444
-#: warehouse/manage/views/__init__.py:2544
+#: warehouse/manage/views/__init__.py:1257
+#: warehouse/manage/views/__init__.py:2264
+#: warehouse/manage/views/__init__.py:2349
+#: warehouse/manage/views/__init__.py:2450
+#: warehouse/manage/views/__init__.py:2550
 msgid "Confirm the request"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1263
+#: warehouse/manage/views/__init__.py:1269
 msgid "Invalid alternate repository id"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1274
+#: warehouse/manage/views/__init__.py:1280
 msgid "Invalid alternate repository for project"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1282
+#: warehouse/manage/views/__init__.py:1288
 msgid ""
 "Could not delete alternate repository - ${confirm} is not the same as "
 "${alt_repo_name}"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1312
+#: warehouse/manage/views/__init__.py:1318
 msgid "Deleted alternate repository '${name}'"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1457
+#: warehouse/manage/views/__init__.py:1463
 msgid "The trusted publisher could not be constrained"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1557
+#: warehouse/manage/views/__init__.py:1563
 msgid ""
 "GitHub-based trusted publishing is temporarily disabled. See "
 "https://pypi.org/help#admin-intervention for details."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1670
+#: warehouse/manage/views/__init__.py:1676
 msgid ""
 "GitLab-based trusted publishing is temporarily disabled. See "
 "https://pypi.org/help#admin-intervention for details."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1782
+#: warehouse/manage/views/__init__.py:1788
 msgid ""
 "Google-based trusted publishing is temporarily disabled. See "
 "https://pypi.org/help#admin-intervention for details."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:1891
+#: warehouse/manage/views/__init__.py:1897
 msgid ""
 "ActiveState-based trusted publishing is temporarily disabled. See "
 "https://pypi.org/help#admin-intervention for details."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2126
-#: warehouse/manage/views/__init__.py:2427
-#: warehouse/manage/views/__init__.py:2535
+#: warehouse/manage/views/__init__.py:2132
+#: warehouse/manage/views/__init__.py:2433
+#: warehouse/manage/views/__init__.py:2541
 msgid ""
 "Project deletion temporarily disabled. See https://pypi.org/help#admin-"
 "intervention for details."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2270
+#: warehouse/manage/views/__init__.py:2276
 msgid "Could not yank release - "
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2355
+#: warehouse/manage/views/__init__.py:2361
 msgid "Could not un-yank release - "
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2456
+#: warehouse/manage/views/__init__.py:2462
 msgid "Could not delete release - "
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2556
+#: warehouse/manage/views/__init__.py:2562
 msgid "Could not find file"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2560
+#: warehouse/manage/views/__init__.py:2566
 msgid "Could not delete file - "
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2710
+#: warehouse/manage/views/__init__.py:2716
 msgid "Team '${team_name}' already has ${role_name} role for project"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2817
+#: warehouse/manage/views/__init__.py:2823
 msgid "User '${username}' already has ${role_name} role for project"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2884
+#: warehouse/manage/views/__init__.py:2890
 msgid "${username} is now ${role} of the '${project_name}' project."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2916
+#: warehouse/manage/views/__init__.py:2922
 msgid ""
 "User '${username}' does not have a verified primary email address and "
 "cannot be added as a ${role_name} for project"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2929
+#: warehouse/manage/views/__init__.py:2935
 #: warehouse/manage/views/organizations.py:889
 msgid "User '${username}' already has an active invite. Please try again later."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:2994
+#: warehouse/manage/views/__init__.py:3000
 #: warehouse/manage/views/organizations.py:954
 msgid "Invitation sent to '${username}'"
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:3027
+#: warehouse/manage/views/__init__.py:3033
 msgid "Could not find role invitation."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:3038
+#: warehouse/manage/views/__init__.py:3044
 msgid "Invitation already expired."
 msgstr ""
 
-#: warehouse/manage/views/__init__.py:3070
+#: warehouse/manage/views/__init__.py:3076
 #: warehouse/manage/views/organizations.py:1141
 msgid "Invitation revoked from '${username}'."
 msgstr ""
@@ -914,8 +914,8 @@ msgstr ""
 #: warehouse/templates/manage/project/release.html:194
 #: warehouse/templates/manage/project/releases.html:140
 #: warehouse/templates/manage/project/releases.html:179
-#: warehouse/templates/packaging/detail.html:407
-#: warehouse/templates/packaging/detail.html:427
+#: warehouse/templates/packaging/detail.html:417
+#: warehouse/templates/packaging/detail.html:437
 #: warehouse/templates/pages/classifiers.html:25
 #: warehouse/templates/pages/help.html:20
 #: warehouse/templates/pages/help.html:228
@@ -1150,7 +1150,7 @@ msgstr ""
 #: warehouse/templates/manage/project/release.html:182
 #: warehouse/templates/manage/project/settings.html:87
 #: warehouse/templates/manage/project/settings.html:136
-#: warehouse/templates/manage/project/settings.html:357
+#: warehouse/templates/manage/project/settings.html:394
 #: warehouse/templates/manage/team/settings.html:84
 msgid "Warning"
 msgstr ""
@@ -6690,7 +6690,7 @@ msgstr ""
 
 #: warehouse/templates/manage/project/settings.html:108
 #: warehouse/templates/manage/project/settings.html:179
-#: warehouse/templates/manage/project/settings.html:395
+#: warehouse/templates/manage/project/settings.html:432
 msgid "Project Name"
 msgstr ""
 
@@ -6835,16 +6835,47 @@ msgstr ""
 msgid "Description of the purpose or content of the alternate repository."
 msgstr ""
 
-#: warehouse/templates/manage/project/settings.html:355
-#: warehouse/templates/manage/project/settings.html:395
+#: warehouse/templates/manage/project/settings.html:354
+#: warehouse/templates/manage/project/settings.html:371
+#: warehouse/templates/manage/project/settings.html:379
+msgid "Archive project"
+msgstr ""
+
+#: warehouse/templates/manage/project/settings.html:359
+#, python-format
+msgid ""
+"Archiving a project will prevent any new uploads. Before doing so, we "
+"recommend publishing a final release with an update to the project's "
+"description to warn the users that the project won't receive further "
+"updates, and to mention any alternative projects they may consider as a "
+"replacement. If your project is <a href=\"%(readme_description_href)s\" "
+"rel=\"noopener\" target=\"_blank\">configured to do so</a>, you can "
+"update the project's description by editing the README file."
+msgstr ""
+
+#: warehouse/templates/manage/project/settings.html:374
+#: warehouse/templates/manage/project/settings.html:385
+msgid "Unarchive project"
+msgstr ""
+
+#: warehouse/templates/manage/project/settings.html:380
+msgid "Archiving a project will block any new file uploads"
+msgstr ""
+
+#: warehouse/templates/manage/project/settings.html:386
+msgid "Unarchiving a project will allow new file uploads"
+msgstr ""
+
+#: warehouse/templates/manage/project/settings.html:392
+#: warehouse/templates/manage/project/settings.html:432
 msgid "Delete project"
 msgstr ""
 
-#: warehouse/templates/manage/project/settings.html:358
+#: warehouse/templates/manage/project/settings.html:395
 msgid "Deleting this project will:"
 msgstr ""
 
-#: warehouse/templates/manage/project/settings.html:363
+#: warehouse/templates/manage/project/settings.html:400
 #, python-format
 msgid ""
 "Irreversibly delete the project along with <a href=\"%(href)s\">%(count)s"
@@ -6855,15 +6886,15 @@ msgid_plural ""
 msgstr[0] ""
 msgstr[1] ""
 
-#: warehouse/templates/manage/project/settings.html:369
+#: warehouse/templates/manage/project/settings.html:406
 msgid "Irreversibly delete the project"
 msgstr ""
 
-#: warehouse/templates/manage/project/settings.html:373
+#: warehouse/templates/manage/project/settings.html:410
 msgid "Make the project name available to <strong>any other PyPI</strong> user"
 msgstr ""
 
-#: warehouse/templates/manage/project/settings.html:375
+#: warehouse/templates/manage/project/settings.html:412
 msgid ""
 "This user will be able to make new releases under this project name, so "
 "long as the distribution filenames do not match filenames from a "
@@ -7053,7 +7084,7 @@ msgstr ""
 
 #: warehouse/templates/packaging/detail.html:238
 #: warehouse/templates/packaging/detail.html:272
-#: warehouse/templates/packaging/detail.html:322
+#: warehouse/templates/packaging/detail.html:332
 msgid "Project description"
 msgstr ""
 
@@ -7064,7 +7095,7 @@ msgstr ""
 
 #: warehouse/templates/packaging/detail.html:244
 #: warehouse/templates/packaging/detail.html:284
-#: warehouse/templates/packaging/detail.html:344
+#: warehouse/templates/packaging/detail.html:354
 msgid "Release history"
 msgstr ""
 
@@ -7075,7 +7106,7 @@ msgstr ""
 
 #: warehouse/templates/packaging/detail.html:251
 #: warehouse/templates/packaging/detail.html:291
-#: warehouse/templates/packaging/detail.html:406
+#: warehouse/templates/packaging/detail.html:416
 msgid "Download files"
 msgstr ""
 
@@ -7084,40 +7115,50 @@ msgid "Project details. Focus will be moved to the project details."
 msgstr ""
 
 #: warehouse/templates/packaging/detail.html:278
-#: warehouse/templates/packaging/detail.html:336
+#: warehouse/templates/packaging/detail.html:346
 msgid "Project details"
 msgstr ""
 
 #: warehouse/templates/packaging/detail.html:318
-#: warehouse/templates/packaging/detail.html:393
+msgid "This project has been archived."
+msgstr ""
+
+#: warehouse/templates/packaging/detail.html:320
+msgid ""
+"The maintainers of this project have marked this project as archived. No "
+"new releases are expected."
+msgstr ""
+
+#: warehouse/templates/packaging/detail.html:328
+#: warehouse/templates/packaging/detail.html:403
 msgid "Reason this release was yanked:"
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:329
+#: warehouse/templates/packaging/detail.html:339
 msgid "The author of this package has not provided a project description"
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:346
+#: warehouse/templates/packaging/detail.html:356
 msgid "Release notifications"
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:347
+#: warehouse/templates/packaging/detail.html:357
 msgid "RSS feed"
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:359
+#: warehouse/templates/packaging/detail.html:369
 msgid "This version"
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:379
+#: warehouse/templates/packaging/detail.html:389
 msgid "pre-release"
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:384
+#: warehouse/templates/packaging/detail.html:394
 msgid "yanked"
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:407
+#: warehouse/templates/packaging/detail.html:417
 #, python-format
 msgid ""
 "Download the file for your platform. If you're not sure which to choose, "
@@ -7125,24 +7166,24 @@ msgid ""
 "target=\"_blank\" rel=\"noopener\">installing packages</a>."
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:410
+#: warehouse/templates/packaging/detail.html:420
 msgid "Source Distribution"
 msgid_plural "Source Distributions"
 msgstr[0] ""
 msgstr[1] ""
 
-#: warehouse/templates/packaging/detail.html:426
+#: warehouse/templates/packaging/detail.html:436
 msgid "No source distribution files available for this release."
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:427
+#: warehouse/templates/packaging/detail.html:437
 #, python-format
 msgid ""
 "See tutorial on <a href=\"%(href)s\" title=\"%(title)s\" "
 "target=\"_blank\" rel=\"noopener\">generating distribution archives</a>."
 msgstr ""
 
-#: warehouse/templates/packaging/detail.html:434
+#: warehouse/templates/packaging/detail.html:444
 msgid "Built Distribution"
 msgid_plural "Built Distributions"
 msgstr[0] ""
diff --git a/warehouse/manage/views/__init__.py b/warehouse/manage/views/__init__.py
index 0023fc0d785f..a619bc1e6ab5 100644
--- a/warehouse/manage/views/__init__.py
+++ b/warehouse/manage/views/__init__.py
@@ -141,7 +141,13 @@
 from warehouse.rate_limiting import IRateLimiter
 from warehouse.utils.http import is_safe_url
 from warehouse.utils.paginate import paginate_url_factory
-from warehouse.utils.project import confirm_project, destroy_docs, remove_project
+from warehouse.utils.project import (
+    archive_project,
+    confirm_project,
+    destroy_docs,
+    remove_project,
+    unarchive_project,
+)
 
 
 class ManageAccountMixin:
@@ -3292,3 +3298,37 @@ def manage_project_history(project, request):
 )
 def manage_project_documentation(project, request):
     return {"project": project}
+
+
+@view_config(
+    route_name="manage.project.archive",
+    context=Project,
+    uses_session=True,
+    require_methods=["POST"],
+    permission=Permissions.ProjectsWrite,
+)
+def archive_project_view(project, request) -> HTTPSeeOther:
+    """
+    Archive a Project. Reversible action.
+    """
+    archive_project(project, request)
+    return HTTPSeeOther(
+        request.route_path("manage.project.settings", project_name=project.name)
+    )
+
+
+@view_config(
+    route_name="manage.project.unarchive",
+    context=Project,
+    uses_session=True,
+    require_methods=["POST"],
+    permission=Permissions.ProjectsWrite,
+)
+def unarchive_project_view(project, request) -> HTTPSeeOther:
+    """
+    Unarchive a Project. Reversible action.
+    """
+    unarchive_project(project, request)
+    return HTTPSeeOther(
+        request.route_path("manage.project.settings", project_name=project.name)
+    )
diff --git a/warehouse/migrations/versions/12a43f12cc18_add_new_lifecycle_statuses.py b/warehouse/migrations/versions/12a43f12cc18_add_new_lifecycle_statuses.py
new file mode 100644
index 000000000000..b1601a763c2d
--- /dev/null
+++ b/warehouse/migrations/versions/12a43f12cc18_add_new_lifecycle_statuses.py
@@ -0,0 +1,55 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Add new lifecycle statuses
+
+Revision ID: 12a43f12cc18
+Revises: 24aa37164e72
+"""
+
+from alembic import op
+from alembic_postgresql_enum import TableReference
+
+revision = "12a43f12cc18"
+down_revision = "24aa37164e72"
+
+
+def upgrade():
+    op.sync_enum_values(
+        "public",
+        "lifecyclestatus",
+        ["quarantine-enter", "quarantine-exit", "archived"],
+        [
+            TableReference(
+                table_schema="public",
+                table_name="projects",
+                column_name="lifecycle_status",
+            )
+        ],
+        enum_values_to_rename=[],
+    )
+
+
+def downgrade():
+    op.sync_enum_values(
+        "public",
+        "lifecyclestatus",
+        ["quarantine-enter", "quarantine-exit"],
+        [
+            TableReference(
+                table_schema="public",
+                table_name="projects",
+                column_name="lifecycle_status",
+            )
+        ],
+        enum_values_to_rename=[],
+    )
diff --git a/warehouse/packaging/models.py b/warehouse/packaging/models.py
index 0b7782741efe..476638de019b 100644
--- a/warehouse/packaging/models.py
+++ b/warehouse/packaging/models.py
@@ -166,6 +166,7 @@ def __contains__(self, project):
 class LifecycleStatus(enum.StrEnum):
     QuarantineEnter = "quarantine-enter"
     QuarantineExit = "quarantine-exit"
+    Archived = "archived"
 
 
 class Project(SitemapMixin, HasEvents, HasObservations, db.Model):
@@ -327,10 +328,14 @@ def __acl__(self):
             (Allow, Authenticated, Permissions.SubmitMalwareObservation),
         ]
 
-        # The project has zero or more OIDC publishers registered to it,
-        # each of which serves as an identity with the ability to upload releases.
-        for publisher in self.oidc_publishers:
-            acls.append((Allow, f"oidc:{publisher.id}", [Permissions.ProjectsUpload]))
+        if self.lifecycle_status != LifecycleStatus.Archived:
+            # The project has zero or more OIDC publishers registered to it,
+            # each of which serves as an identity with the ability to upload releases
+            # (only if the project is not archived)
+            for publisher in self.oidc_publishers:
+                acls.append(
+                    (Allow, f"oidc:{publisher.id}", [Permissions.ProjectsUpload])
+                )
 
         # Get all of the users for this project.
         user_query = (
@@ -376,27 +381,25 @@ def __acl__(self):
         for user_id, permission_name in sorted(permissions, key=lambda x: (x[1], x[0])):
             # Disallow Write permissions for Projects in quarantine, allow Upload
             if self.lifecycle_status == LifecycleStatus.QuarantineEnter:
-                acls.append(
-                    (
-                        Allow,
-                        f"user:{user_id}",
-                        [Permissions.ProjectsRead, Permissions.ProjectsUpload],
-                    )
-                )
+                current_permissions = [
+                    Permissions.ProjectsRead,
+                    Permissions.ProjectsUpload,
+                ]
             elif permission_name == "Administer":
-                acls.append(
-                    (
-                        Allow,
-                        f"user:{user_id}",
-                        [
-                            Permissions.ProjectsRead,
-                            Permissions.ProjectsUpload,
-                            Permissions.ProjectsWrite,
-                        ],
-                    )
-                )
+                current_permissions = [
+                    Permissions.ProjectsRead,
+                    Permissions.ProjectsUpload,
+                    Permissions.ProjectsWrite,
+                ]
             else:
-                acls.append((Allow, f"user:{user_id}", [Permissions.ProjectsUpload]))
+                current_permissions = [Permissions.ProjectsUpload]
+
+            if self.lifecycle_status == LifecycleStatus.Archived:
+                # Disallow upload permissions for archived projects
+                current_permissions.remove(Permissions.ProjectsUpload)
+
+            if current_permissions:
+                acls.append((Allow, f"user:{user_id}", current_permissions))
         return acls
 
     @property
diff --git a/warehouse/routes.py b/warehouse/routes.py
index c31158dbab82..e8566619705c 100644
--- a/warehouse/routes.py
+++ b/warehouse/routes.py
@@ -493,6 +493,20 @@ def includeme(config):
         traverse="/{project_name}",
         domain=warehouse,
     )
+    config.add_route(
+        "manage.project.archive",
+        "/manage/project/{project_name}/archive/",
+        factory="warehouse.packaging.models:ProjectFactory",
+        traverse="/{project_name}",
+        domain=warehouse,
+    )
+    config.add_route(
+        "manage.project.unarchive",
+        "/manage/project/{project_name}/unarchive/",
+        factory="warehouse.packaging.models:ProjectFactory",
+        traverse="/{project_name}",
+        domain=warehouse,
+    )
     config.add_route(
         "manage.project.history",
         "/manage/project/{project_name}/history/",
diff --git a/warehouse/templates/manage/project/settings.html b/warehouse/templates/manage/project/settings.html
index 609b684067f6..40d6201a500b 100644
--- a/warehouse/templates/manage/project/settings.html
+++ b/warehouse/templates/manage/project/settings.html
@@ -351,6 +351,43 @@ <h3>
 
   <hr>
 
+  <h2>{% trans %}Archive project{% endtrans %}</h2>
+  {% set can_be_archived = not project.lifecycle_status or project.lifecycle_status == "quarantine-exit" %}
+  {% set can_be_unarchived = project.lifecycle_status == "archived" %}
+  <div class="callout-block callout-block--danger" data-controller="archive-confirm">
+  <p>
+    {% trans readme_description_href='https://packaging.python.org/guides/making-a-pypi-friendly-readme/'%}
+    Archiving a project will prevent any new uploads. Before doing so, we
+    recommend publishing a final release with an update to the project's
+    description to warn the users that the project won't receive further updates,
+    and to mention any alternative projects they may consider as a replacement.
+    If your project is
+    <a href="{{ readme_description_href }}" rel="noopener" target="_blank">configured
+    to do so</a>, you can update the project's description by editing the README file.
+    {% endtrans %}
+  </p>
+  </div>
+    <a href="#archive-project" class="button button--primary {{ 'button--disabled' if not can_be_archived }}">
+      {% trans %}Archive project{% endtrans %}
+    </a>
+    <a href="#unarchive-project" class="button button--primary {{ 'button--disabled' if not can_be_unarchived }}">
+      {% trans %}Unarchive project{% endtrans %}
+    </a>
+
+  {% set action = request.route_path('manage.project.archive', project_name=project.name) %}
+  {% set slug = "archive-project" %}
+  {% set title = gettext("Archive project") %}
+  {% set extra_description = gettext("Archiving a project will block any new file uploads") %}
+  {{ confirm_modal(title=title, label=project.name, slug=slug, extra_description=extra_description, action=action, warning=False) }}
+
+  {% set action = request.route_path('manage.project.unarchive', project_name=project.name) %}
+  {% set slug = "unarchive-project" %}
+  {% set title = gettext("Unarchive project") %}
+  {% set extra_description = gettext("Unarchiving a project will allow new file uploads") %}
+  {{ confirm_modal(title=title, label=project.name, slug=slug, extra_description=extra_description, action=action, warning=False) }}
+
+  <hr>
+
   <div class="callout-block callout-block--danger" data-controller="delete-confirm">
     <h3>{% trans %}Delete project{% endtrans %}</h3>
     <p>
diff --git a/warehouse/templates/packaging/detail.html b/warehouse/templates/packaging/detail.html
index fef56c293cda..a789e0897261 100644
--- a/warehouse/templates/packaging/detail.html
+++ b/warehouse/templates/packaging/detail.html
@@ -313,6 +313,16 @@ <h3 class="sidebar-section__title">{% trans %}Navigation{% endtrans %}</h3>
                 {% endtrans %}
               </p>
             </div>
+          {% elif project.lifecycle_status == "archived" %}
+            <div class="callout-block callout-block--warning">
+              <p>{% trans %}This project has been archived.{% endtrans %}</p>
+              <p>
+                {% trans %}
+                  The maintainers of this project have marked this project as archived.
+                  No new releases are expected.
+                {% endtrans %}
+              </p>
+            </div>
           {% elif release.yanked and release.yanked_reason %}
             <div class="callout-block callout-block--danger">
               <p>{% trans %}Reason this release was yanked:{% endtrans %}</p>
diff --git a/warehouse/utils/project.py b/warehouse/utils/project.py
index e6ff187e770e..4ddefc027f09 100644
--- a/warehouse/utils/project.py
+++ b/warehouse/utils/project.py
@@ -196,3 +196,44 @@ def destroy_docs(project, request, flash=True):
         request.session.flash(
             f"Deleted docs for project {project.name!r}", queue="success"
         )
+
+
+def archive_project(project: Project, request) -> None:
+    if (
+        project.lifecycle_status is not None
+        and project.lifecycle_status != LifecycleStatus.QuarantineExit
+    ):
+        request.session.flash(
+            f"Cannot archive project with status {project.lifecycle_status}",
+            queue="error",
+        )
+        return
+
+    project.lifecycle_status = LifecycleStatus.Archived
+    project.record_event(
+        tag=EventTag.Project.ProjectArchiveEnter,
+        request=request,
+        additional={
+            "submitted_by": request.user.username,
+        },
+    )
+    request.session.flash("Project archived", queue="success")
+
+
+def unarchive_project(project: Project, request) -> None:
+    if project.lifecycle_status != LifecycleStatus.Archived:
+        request.session.flash(
+            "Can only unarchive an archived project",
+            queue="error",
+        )
+        return
+
+    project.lifecycle_status = None
+    project.record_event(
+        tag=EventTag.Project.ProjectArchiveExit,
+        request=request,
+        additional={
+            "submitted_by": request.user.username,
+        },
+    )
+    request.session.flash("Project unarchived", queue="success")