diff --git a/assets/l10n/app_en.arb b/assets/l10n/app_en.arb
index ea2e10cff3..8db96d913c 100644
--- a/assets/l10n/app_en.arb
+++ b/assets/l10n/app_en.arb
@@ -375,6 +375,10 @@
   "@unknownChannelName": {
     "description": "Replacement name for channel when it cannot be found in the store."
   },
+  "channelArchivedLabel": "(archived)",
+  "@channelArchivedLabel": {
+    "description": "Label shown next to an archived channel's name in headers."
+  },
   "composeBoxTopicHintText": "Topic",
   "@composeBoxTopicHintText":  {
     "description": "Hint text for topic input widget in compose box."
diff --git a/lib/api/model/model.dart b/lib/api/model/model.dart
index 5c94626584..669e4b0b9d 100644
--- a/lib/api/model/model.dart
+++ b/lib/api/model/model.dart
@@ -328,6 +328,8 @@ class ZulipStream {
 
   final int streamId;
   String name;
+  @JsonKey(defaultValue: false) // TODO(server-10): remove default
+  bool isArchived;
   String description;
   String renderedDescription;
 
@@ -350,6 +352,7 @@ class ZulipStream {
   ZulipStream({
     required this.streamId,
     required this.name,
+    required this.isArchived,
     required this.description,
     required this.renderedDescription,
     required this.dateCreated,
@@ -460,6 +463,7 @@ class Subscription extends ZulipStream {
   Subscription({
     required super.streamId,
     required super.name,
+    required super.isArchived,
     required super.description,
     required super.renderedDescription,
     required super.dateCreated,
diff --git a/lib/api/model/model.g.dart b/lib/api/model/model.g.dart
index 32c8eeb0e7..f964e0f148 100644
--- a/lib/api/model/model.g.dart
+++ b/lib/api/model/model.g.dart
@@ -165,6 +165,7 @@ Map<String, dynamic> _$ProfileFieldUserDataToJson(
 ZulipStream _$ZulipStreamFromJson(Map<String, dynamic> json) => ZulipStream(
   streamId: (json['stream_id'] as num).toInt(),
   name: json['name'] as String,
+  isArchived: json['is_archived'] as bool? ?? false,
   description: json['description'] as String,
   renderedDescription: json['rendered_description'] as String,
   dateCreated: (json['date_created'] as num).toInt(),
@@ -184,6 +185,7 @@ Map<String, dynamic> _$ZulipStreamToJson(ZulipStream instance) =>
     <String, dynamic>{
       'stream_id': instance.streamId,
       'name': instance.name,
+      'is_archived': instance.isArchived,
       'description': instance.description,
       'rendered_description': instance.renderedDescription,
       'date_created': instance.dateCreated,
@@ -207,6 +209,7 @@ const _$ChannelPostPolicyEnumMap = {
 Subscription _$SubscriptionFromJson(Map<String, dynamic> json) => Subscription(
   streamId: (json['stream_id'] as num).toInt(),
   name: json['name'] as String,
+  isArchived: json['is_archived'] as bool? ?? false,
   description: json['description'] as String,
   renderedDescription: json['rendered_description'] as String,
   dateCreated: (json['date_created'] as num).toInt(),
@@ -234,6 +237,7 @@ Map<String, dynamic> _$SubscriptionToJson(Subscription instance) =>
     <String, dynamic>{
       'stream_id': instance.streamId,
       'name': instance.name,
+      'is_archived': instance.isArchived,
       'description': instance.description,
       'rendered_description': instance.renderedDescription,
       'date_created': instance.dateCreated,
diff --git a/lib/api/route/events.dart b/lib/api/route/events.dart
index bbd7be5a0a..7101276d6a 100644
--- a/lib/api/route/events.dart
+++ b/lib/api/route/events.dart
@@ -18,6 +18,7 @@ Future<InitialSnapshot> registerQueue(ApiConnection connection) {
       'user_avatar_url_field_optional': false, // TODO(#254): turn on
       'stream_typing_notifications': true,
       'user_settings_object': true,
+      'archived_channels': true,
     },
   });
 }
diff --git a/lib/generated/l10n/zulip_localizations.dart b/lib/generated/l10n/zulip_localizations.dart
index d09393e774..0d73f4ee3d 100644
--- a/lib/generated/l10n/zulip_localizations.dart
+++ b/lib/generated/l10n/zulip_localizations.dart
@@ -603,6 +603,12 @@ abstract class ZulipLocalizations {
   /// **'(unknown channel)'**
   String get unknownChannelName;
 
+  /// Label shown next to an archived channel's name in headers.
+  ///
+  /// In en, this message translates to:
+  /// **'(archived)'**
+  String get channelArchivedLabel;
+
   /// Hint text for topic input widget in compose box.
   ///
   /// In en, this message translates to:
diff --git a/lib/generated/l10n/zulip_localizations_ar.dart b/lib/generated/l10n/zulip_localizations_ar.dart
index c2478f4613..f77b509aa0 100644
--- a/lib/generated/l10n/zulip_localizations_ar.dart
+++ b/lib/generated/l10n/zulip_localizations_ar.dart
@@ -295,6 +295,9 @@ class ZulipLocalizationsAr extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 
diff --git a/lib/generated/l10n/zulip_localizations_en.dart b/lib/generated/l10n/zulip_localizations_en.dart
index 289ba33af2..c176b35733 100644
--- a/lib/generated/l10n/zulip_localizations_en.dart
+++ b/lib/generated/l10n/zulip_localizations_en.dart
@@ -295,6 +295,9 @@ class ZulipLocalizationsEn extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 
diff --git a/lib/generated/l10n/zulip_localizations_ja.dart b/lib/generated/l10n/zulip_localizations_ja.dart
index 00537f73a2..a944a1893e 100644
--- a/lib/generated/l10n/zulip_localizations_ja.dart
+++ b/lib/generated/l10n/zulip_localizations_ja.dart
@@ -295,6 +295,9 @@ class ZulipLocalizationsJa extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 
diff --git a/lib/generated/l10n/zulip_localizations_nb.dart b/lib/generated/l10n/zulip_localizations_nb.dart
index 3c063e91da..a881e72bec 100644
--- a/lib/generated/l10n/zulip_localizations_nb.dart
+++ b/lib/generated/l10n/zulip_localizations_nb.dart
@@ -295,6 +295,9 @@ class ZulipLocalizationsNb extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 
diff --git a/lib/generated/l10n/zulip_localizations_pl.dart b/lib/generated/l10n/zulip_localizations_pl.dart
index 64705fbe02..54c2fee017 100644
--- a/lib/generated/l10n/zulip_localizations_pl.dart
+++ b/lib/generated/l10n/zulip_localizations_pl.dart
@@ -295,6 +295,9 @@ class ZulipLocalizationsPl extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(nieznany kanał)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Wątek';
 
diff --git a/lib/generated/l10n/zulip_localizations_ru.dart b/lib/generated/l10n/zulip_localizations_ru.dart
index 911fc281b2..259b2e4834 100644
--- a/lib/generated/l10n/zulip_localizations_ru.dart
+++ b/lib/generated/l10n/zulip_localizations_ru.dart
@@ -295,6 +295,9 @@ class ZulipLocalizationsRu extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Тема';
 
diff --git a/lib/generated/l10n/zulip_localizations_sk.dart b/lib/generated/l10n/zulip_localizations_sk.dart
index 0cb42c3a37..dd73647a72 100644
--- a/lib/generated/l10n/zulip_localizations_sk.dart
+++ b/lib/generated/l10n/zulip_localizations_sk.dart
@@ -295,6 +295,9 @@ class ZulipLocalizationsSk extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 
diff --git a/lib/widgets/action_sheet.dart b/lib/widgets/action_sheet.dart
index 0594bd27d2..b41faf0ff9 100644
--- a/lib/widgets/action_sheet.dart
+++ b/lib/widgets/action_sheet.dart
@@ -230,10 +230,12 @@ void showTopicActionSheet(BuildContext context, {
   final pageContext = PageRoot.contextOf(context);
 
   final store = PerAccountStoreWidget.of(pageContext);
+  final channel = store.streams[channelId];
   final subscription = store.subscriptions[channelId];
 
   final optionButtons = <ActionSheetMenuItemButton>[];
 
+  final isChannelArchived = channel?.isArchived == true;
   // TODO(server-7): simplify this condition away
   final supportsUnmutingTopics = store.zulipFeatureLevel >= 170;
   // TODO(server-8): simplify this condition away
@@ -241,8 +243,9 @@ void showTopicActionSheet(BuildContext context, {
 
   final visibilityOptions = <UserTopicVisibilityPolicy>[];
   final visibilityPolicy = store.topicVisibilityPolicy(channelId, topic);
-  if (subscription == null) {
-    // Not subscribed to the channel; there is no user topic change to be made.
+  if (subscription == null || isChannelArchived) {
+    // Not subscribed to the channel or the channel is archived;
+    // there is no user topic change to be made.
   } else if (!subscription.isMuted) {
     // Channel is subscribed and not muted.
     switch (visibilityPolicy) {
@@ -306,7 +309,8 @@ void showTopicActionSheet(BuildContext context, {
   //   limit for editing topics).
   if (someMessageIdInTopic != null
       // ignore: unnecessary_null_comparison // null topic names soon to be enabled
-      && topic.displayName != null) {
+      && topic.displayName != null
+      && !isChannelArchived) {
     optionButtons.add(ResolveUnresolveButton(pageContext: pageContext,
       topic: topic,
       someMessageIdInTopic: someMessageIdInTopic));
@@ -564,6 +568,11 @@ void showMessageActionSheet({required BuildContext context, required Message mes
   final messageListPage = MessageListPage.ancestorOf(pageContext);
   final isComposeBoxOffered = messageListPage.composeBoxController != null;
 
+  bool isInArchivedChannel = false;
+  if (message is StreamMessage) {
+    final channel = store.streams[message.streamId];
+    isInArchivedChannel = channel?.isArchived == true;
+  }
   final isMessageRead = message.flags.contains(MessageFlag.read);
   final markAsUnreadSupported = store.zulipFeatureLevel >= 155; // TODO(server-6)
   final showMarkAsUnreadButton = markAsUnreadSupported && isMessageRead;
@@ -571,7 +580,7 @@ void showMessageActionSheet({required BuildContext context, required Message mes
   final optionButtons = [
     ReactionButtons(message: message, pageContext: pageContext),
     StarButton(message: message, pageContext: pageContext),
-    if (isComposeBoxOffered)
+    if (isComposeBoxOffered && !isInArchivedChannel)
       QuoteAndReplyButton(message: message, pageContext: pageContext),
     if (showMarkAsUnreadButton)
       MarkAsUnreadButton(message: message, pageContext: pageContext),
diff --git a/lib/widgets/compose_box.dart b/lib/widgets/compose_box.dart
index aabf592dae..1127b4bff5 100644
--- a/lib/widgets/compose_box.dart
+++ b/lib/widgets/compose_box.dart
@@ -1545,8 +1545,10 @@ class _ComposeBoxState extends State<ComposeBox> with PerAccountStoreAwareStateM
       case ChannelNarrow(:final streamId):
       case TopicNarrow(:final streamId):
         final channel = store.streams[streamId];
-        if (channel == null || !store.hasPostingPermission(inChannel: channel,
-            user: store.selfUser, byDate: DateTime.now())) {
+       if (channel == null
+            || !store.hasPostingPermission(inChannel: channel,
+                 user: store.selfUser, byDate: DateTime.now())
+            || channel.isArchived) {
           return _ErrorBanner(getLabel: (zulipLocalizations) =>
             zulipLocalizations.errorBannerCannotPostInChannelLabel);
         }
diff --git a/lib/widgets/inbox.dart b/lib/widgets/inbox.dart
index a8c0c12b59..3e03da03a9 100644
--- a/lib/widgets/inbox.dart
+++ b/lib/widgets/inbox.dart
@@ -240,6 +240,7 @@ abstract class _HeaderItem extends StatelessWidget {
 
   String title(ZulipLocalizations zulipLocalizations);
   IconData get icon;
+  InlineSpan? buildTrailing(BuildContext context) => null;
   Color collapsedIconColor(BuildContext context);
   Color uncollapsedIconColor(BuildContext context);
   Color uncollapsedBackgroundColor(BuildContext context);
@@ -285,18 +286,24 @@ abstract class _HeaderItem extends StatelessWidget {
               : uncollapsedIconColor(context),
             icon),
           const SizedBox(width: 5),
-          Expanded(child: Padding(
-            padding: const EdgeInsets.symmetric(vertical: 4),
-            child: Text(
-              style: TextStyle(
-                fontSize: 17,
-                height: (20 / 17),
-                // TODO(design) check if this is the right variable
-                color: designVariables.labelMenuButton,
-              ).merge(weightVariableTextStyle(context, wght: 600)),
-              maxLines: 1,
-              overflow: TextOverflow.ellipsis,
-              title(zulipLocalizations)))),
+          Expanded(
+            child: Padding(
+              padding: const EdgeInsets.symmetric(vertical: 4),
+              child: RichText(
+                maxLines: 1,
+                overflow: TextOverflow.ellipsis,
+                text: TextSpan(
+                  children: [
+                    TextSpan(
+                      text: title(zulipLocalizations),
+                      style: TextStyle(
+                        fontSize: 17,
+                        height: 20 / 17,
+                        // TODO(design) check if this is the right variable
+                        color: designVariables.labelMenuButton)
+                          .merge(weightVariableTextStyle(context, wght: 600))),
+                    buildTrailing(context) ?? const TextSpan(),
+                  ])))),
           const SizedBox(width: 12),
           if (hasMention) const _IconMarker(icon: ZulipIcons.at_sign),
           Padding(padding: const EdgeInsetsDirectional.only(end: 16),
@@ -436,9 +443,11 @@ mixin _LongPressable on _HeaderItem {
 
 class _StreamHeaderItem extends _HeaderItem with _LongPressable {
   final Subscription subscription;
+  final bool isArchived;
 
   const _StreamHeaderItem({
     required this.subscription,
+    required this.isArchived,
     required super.collapsed,
     required super.pageState,
     required super.count,
@@ -449,6 +458,23 @@ class _StreamHeaderItem extends _HeaderItem with _LongPressable {
   @override String title(ZulipLocalizations zulipLocalizations) =>
     subscription.name;
   @override IconData get icon => iconDataForStream(subscription);
+  @override InlineSpan? buildTrailing(BuildContext context) {
+    if (!isArchived) return null;
+
+    final designVariables = DesignVariables.of(context);
+    final zulipLocalizations = ZulipLocalizations.of(context);
+
+    return WidgetSpan(
+      child: Padding(
+        padding: const EdgeInsetsDirectional.only(start: 4),
+        child: Text(
+          zulipLocalizations.channelArchivedLabel,
+          style: TextStyle(
+            fontSize: 17,
+            height: 20 / 17,
+            color: designVariables.labelMessageHeaderArchived,
+            fontStyle: FontStyle.italic))));
+  }
   @override Color collapsedIconColor(context) =>
     colorSwatchFor(context, subscription).iconOnPlainBackground;
   @override Color uncollapsedIconColor(context) =>
@@ -495,6 +521,7 @@ class _StreamSection extends StatelessWidget {
       collapsed: collapsed,
       pageState: pageState,
       sectionContext: context,
+      isArchived: subscription.isArchived,
     );
     return StickyHeaderItem(
       header: header,
diff --git a/lib/widgets/message_list.dart b/lib/widgets/message_list.dart
index 1e95a1be49..b6645b643d 100644
--- a/lib/widgets/message_list.dart
+++ b/lib/widgets/message_list.dart
@@ -313,6 +313,7 @@ class MessageListAppBarTitle extends StatelessWidget {
     ZulipStream? stream,
   }) {
     final zulipLocalizations = ZulipLocalizations.of(context);
+    final designVariables = DesignVariables.of(context);
     // A null [Icon.icon] makes a blank space.
     final icon = stream != null ? iconDataForStream(stream) : null;
     return Row(
@@ -326,6 +327,17 @@ class MessageListAppBarTitle extends StatelessWidget {
         const SizedBox(width: 4),
         Flexible(child: Text(
           stream?.name ?? zulipLocalizations.unknownChannelName)),
+        if (stream?.isArchived ?? false)
+          // TODO(#1285): Avoid concatenating translated strings
+          Padding(
+            padding: EdgeInsetsDirectional.fromSTEB(4, 4, 0, 4),
+            child: Text(
+              zulipLocalizations.channelArchivedLabel,
+              style: TextStyle(
+                fontSize: 18,
+                // TODO(design): check if this is the right variable
+                color: designVariables.labelMessageHeaderArchived,
+                fontStyle: FontStyle.italic))),
       ]);
   }
 
@@ -1102,6 +1114,18 @@ class StreamMessageRecipientHeader extends StatelessWidget {
                 style: recipientHeaderTextStyle(context),
                 overflow: TextOverflow.ellipsis),
             ),
+            if (stream?.isArchived ?? false)
+              // TODO(#1285): Avoid concatenating translated strings
+              Padding(
+                padding: const EdgeInsetsDirectional.fromSTEB(4, 4, 0, 4),
+                child: Text(
+                  zulipLocalizations.channelArchivedLabel,
+                  style: recipientHeaderTextStyle(context,
+                    // TODO(design): check if this is the right variable
+                    color: designVariables.labelMessageHeaderArchived,
+                    fontStyle: FontStyle.italic),
+                  overflow: TextOverflow.ellipsis,
+                  maxLines: 1)),
             Padding(
               // Figma has 5px horizontal padding around an 8px wide icon.
               // Icon is 16px wide here so horizontal padding is 1px.
@@ -1220,9 +1244,13 @@ class DmRecipientHeader extends StatelessWidget {
   }
 }
 
-TextStyle recipientHeaderTextStyle(BuildContext context, {FontStyle? fontStyle}) {
+TextStyle recipientHeaderTextStyle(
+  BuildContext context, {
+  Color? color,
+  FontStyle? fontStyle,
+}) {
   return TextStyle(
-    color: DesignVariables.of(context).title,
+    color: color ?? DesignVariables.of(context).title,
     fontSize: 16,
     letterSpacing: proportionalLetterSpacing(context, 0.02, baseFontSize: 16),
     height: (18 / 16),
diff --git a/lib/widgets/subscription_list.dart b/lib/widgets/subscription_list.dart
index 062bb9743e..2241f4a011 100644
--- a/lib/widgets/subscription_list.dart
+++ b/lib/widgets/subscription_list.dart
@@ -85,6 +85,7 @@ class _SubscriptionListPageBodyState extends State<SubscriptionListPageBody> wit
     final List<Subscription> pinned = [];
     final List<Subscription> unpinned = [];
     for (final subscription in store.subscriptions.values) {
+      if (subscription.isArchived) continue;
       if (subscription.pinToTop) {
         pinned.add(subscription);
       } else {
@@ -188,6 +189,8 @@ class _SubscriptionList extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    assert(subscriptions.every((subscription) => !subscription.isArchived));
+
     return SliverList.builder(
       itemCount: subscriptions.length,
       itemBuilder: (BuildContext context, int index) {
diff --git a/lib/widgets/theme.dart b/lib/widgets/theme.dart
index eea9677045..ae1e80d109 100644
--- a/lib/widgets/theme.dart
+++ b/lib/widgets/theme.dart
@@ -172,6 +172,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
     groupDmConversationIcon: Colors.black.withValues(alpha: 0.5),
     groupDmConversationIconBg: const Color(0x33808080),
     inboxItemIconMarker: const HSLColor.fromAHSL(0.5, 0, 0, 0.2).toColor(),
+    labelMessageHeaderArchived: const HSLColor.fromAHSL(0.5, 0, 0, 0.5).toColor(),
     loginOrDivider: const Color(0xffdedede),
     loginOrDividerText: const Color(0xff575757),
     modalBarrierColor: const Color(0xff000000).withValues(alpha: 0.3),
@@ -232,6 +233,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
     // TODO(design-dark) need proper dark-theme color (this is ad hoc)
     groupDmConversationIconBg: const Color(0x33cccccc),
     inboxItemIconMarker: const HSLColor.fromAHSL(0.4, 0, 0, 1).toColor(),
+    labelMessageHeaderArchived: const HSLColor.fromAHSL(0.5, 0, 0, 0.5).toColor(),
     loginOrDivider: const Color(0xff424242),
     loginOrDividerText: const Color(0xffa8a8a8),
     modalBarrierColor: const Color(0xff000000).withValues(alpha: 0.5),
@@ -294,6 +296,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
     required this.groupDmConversationIcon,
     required this.groupDmConversationIconBg,
     required this.inboxItemIconMarker,
+    required this.labelMessageHeaderArchived,
     required this.loginOrDivider,
     required this.loginOrDividerText,
     required this.modalBarrierColor,
@@ -364,6 +367,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
   final Color groupDmConversationIcon;
   final Color groupDmConversationIconBg;
   final Color inboxItemIconMarker;
+  final Color labelMessageHeaderArchived;
   final Color loginOrDivider; // TODO(design-dark) need proper dark-theme color (this is ad hoc)
   final Color loginOrDividerText; // TODO(design-dark) need proper dark-theme color (this is ad hoc)
   final Color modalBarrierColor;
@@ -421,6 +425,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
     Color? groupDmConversationIcon,
     Color? groupDmConversationIconBg,
     Color? inboxItemIconMarker,
+    Color? labelMessageHeaderArchived,
     Color? loginOrDivider,
     Color? loginOrDividerText,
     Color? modalBarrierColor,
@@ -477,6 +482,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
       groupDmConversationIcon: groupDmConversationIcon ?? this.groupDmConversationIcon,
       groupDmConversationIconBg: groupDmConversationIconBg ?? this.groupDmConversationIconBg,
       inboxItemIconMarker: inboxItemIconMarker ?? this.inboxItemIconMarker,
+      labelMessageHeaderArchived: labelMessageHeaderArchived ?? this.labelMessageHeaderArchived,
       loginOrDivider: loginOrDivider ?? this.loginOrDivider,
       loginOrDividerText: loginOrDividerText ?? this.loginOrDividerText,
       modalBarrierColor: modalBarrierColor ?? this.modalBarrierColor,
@@ -540,6 +546,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
       groupDmConversationIcon: Color.lerp(groupDmConversationIcon, other.groupDmConversationIcon, t)!,
       groupDmConversationIconBg: Color.lerp(groupDmConversationIconBg, other.groupDmConversationIconBg, t)!,
       inboxItemIconMarker: Color.lerp(inboxItemIconMarker, other.inboxItemIconMarker, t)!,
+      labelMessageHeaderArchived: Color.lerp(labelMessageHeaderArchived, other.labelMessageHeaderArchived, t)!,
       loginOrDivider: Color.lerp(loginOrDivider, other.loginOrDivider, t)!,
       loginOrDividerText: Color.lerp(loginOrDividerText, other.loginOrDividerText, t)!,
       modalBarrierColor: Color.lerp(modalBarrierColor, other.modalBarrierColor, t)!,
diff --git a/test/example_data.dart b/test/example_data.dart
index afa378aa7e..0d3c645b20 100644
--- a/test/example_data.dart
+++ b/test/example_data.dart
@@ -253,6 +253,7 @@ int _lastStreamId = 200;
 ZulipStream stream({
   int? streamId,
   String? name,
+  bool? isArchived,
   String? description,
   String? renderedDescription,
   int? dateCreated,
@@ -272,6 +273,7 @@ ZulipStream stream({
   return ZulipStream(
     streamId: effectiveStreamId,
     name: effectiveName,
+    isArchived: isArchived ?? false,
     description: effectiveDescription,
     renderedDescription: renderedDescription ?? '<p>$effectiveDescription</p>',
     dateCreated: dateCreated ?? 1686774898,
@@ -310,6 +312,7 @@ Subscription subscription(
   return Subscription(
     streamId: stream.streamId,
     name: stream.name,
+    isArchived: stream.isArchived,
     description: stream.description,
     renderedDescription: stream.renderedDescription,
     dateCreated: stream.dateCreated,
diff --git a/test/widgets/action_sheet_test.dart b/test/widgets/action_sheet_test.dart
index 8aeeec4eed..866e8da027 100644
--- a/test/widgets/action_sheet_test.dart
+++ b/test/widgets/action_sheet_test.dart
@@ -52,6 +52,7 @@ late FakeApiConnection connection;
 Future<void> setupToMessageActionSheet(WidgetTester tester, {
   required Message message,
   required Narrow narrow,
+  bool? isArchived,
 }) async {
   addTearDown(testBinding.reset);
   assert(narrow.containsMessage(message));
@@ -65,7 +66,10 @@ Future<void> setupToMessageActionSheet(WidgetTester tester, {
       ...narrow.otherRecipientIds.map((id) => eg.user(userId: id)),
   ]);
   if (message is StreamMessage) {
-    final stream = eg.stream(streamId: message.streamId);
+    final stream = eg.stream(
+      streamId: message.streamId,
+      isArchived: isArchived ?? false,
+    );
     await store.addStream(stream);
     await store.addSubscription(eg.subscription(stream));
   }
@@ -134,7 +138,8 @@ void main() {
       await tester.pump();
       check(find.byType(InboxPageBody)).findsOne();
 
-      await tester.longPress(find.text(someChannel.name).hitTestable());
+      await tester.longPress(
+        find.textContaining(findRichText: true, someChannel.name).first);
       await tester.pump(const Duration(milliseconds: 250));
     }
 
@@ -183,9 +188,8 @@ void main() {
         child: const MessageListPage(initNarrow: CombinedFeedNarrow())));
       await tester.pumpAndSettle();
 
-      await tester.longPress(find.descendant(
-        of: find.byType(RecipientHeader),
-        matching: find.text(message.displayRecipient ?? '')));
+      await tester.longPress(
+        find.textContaining(findRichText: true, message.displayRecipient ?? '').first);
       await tester.pump(const Duration(milliseconds: 250));
     }
 
@@ -479,15 +483,17 @@ void main() {
       /// If `isChannelMuted` is `null`, the user is not subscribed to the
       /// channel.
       Future<void> setupToTopicActionSheet(WidgetTester tester, {
+        ZulipStream? channel,
         required bool? isChannelMuted,
         required UserTopicVisibilityPolicy visibilityPolicy,
         int? zulipFeatureLevel,
       }) async {
         addTearDown(testBinding.reset);
+        channel ??= someChannel;
 
         topic = 'isChannelMuted: $isChannelMuted, policy: $visibilityPolicy';
         await prepare(
-          channel: someChannel,
+          channel: channel,
           topic: topic,
           isChannelSubscribed: isChannelMuted != null, // shorthand; see dartdoc
           isChannelMuted: isChannelMuted,
@@ -496,9 +502,13 @@ void main() {
         );
 
         final message = eg.streamMessage(
-          stream: someChannel, topic: topic, sender: eg.otherUser);
+          stream: channel, topic: topic, sender: eg.otherUser);
+        await store.handleEvent(MessageEvent(
+          id: 1,
+          message: message,
+          localMessageId: null));
         await showFromAppBar(tester,
-          channel: someChannel, topic: TopicName(topic), messages: [message]);
+          channel: channel, topic: TopicName(topic), messages: [message]);
       }
 
       void checkButtons(List<Finder> expectedButtonFinders) {
@@ -604,6 +614,18 @@ void main() {
         }
       });
 
+      group('archived channels', () {
+        testWidgets('limited topic actions for archived channels', (tester) async {
+          final archivedChannel = eg.stream(isArchived: true);
+
+          await setupToTopicActionSheet(tester,
+            channel: archivedChannel,
+            isChannelMuted: false,
+            visibilityPolicy: UserTopicVisibilityPolicy.none);
+          checkButtons([]);
+        });
+      });
+
       group('legacy: follow is unsupported when FL < 219', () {
         final testCases = [
           (false, UserTopicVisibilityPolicy.muted,    [unmute]),
@@ -762,6 +784,30 @@ void main() {
         checkErrorDialog(tester,
           expectedTitle: 'Failed to mark topic as unresolved');
       });
+
+      testWidgets('not offered in archived channel', (tester) async {
+        final archivedChannel = eg.stream(isArchived: true);
+        final message = eg.streamMessage(stream: archivedChannel, topic: 'zulip');
+
+        await prepare(channel: archivedChannel, topic: 'zulip');
+        await showFromAppBar(tester,
+          channel: archivedChannel,
+          topic: TopicName('zulip'),
+          messages: [message]);
+        check(findButtonForLabel('Mark as resolved')).findsNothing();
+      });
+
+      testWidgets('not offered in archived channel with resolved topic', (tester) async {
+        final archivedChannel = eg.stream(isArchived: true);
+        final message = eg.streamMessage(stream: archivedChannel, topic: '✔ zulip');
+
+        await prepare(channel: archivedChannel, topic: '✔ zulip');
+        await showFromAppBar(tester,
+          channel: archivedChannel,
+          topic: TopicName('✔ zulip'),
+          messages: [message]);
+        check(findButtonForLabel('Mark as unresolved')).findsNothing();
+      });
     });
 
     group('MarkTopicAsReadButton', () {
@@ -1156,6 +1202,16 @@ void main() {
         await setupToMessageActionSheet(tester, message: message, narrow: const StarredMessagesNarrow());
         check(findQuoteAndReplyButton(tester)).isNull();
       });
+
+      testWidgets('not offered in archived channels', (tester) async {
+        final message = eg.streamMessage();
+
+        await setupToMessageActionSheet(tester,
+          message: message,
+          narrow: TopicNarrow.ofMessage(message),
+          isArchived: true);
+        check(findQuoteAndReplyButton(tester)).isNull();
+      });
     });
 
     group('MarkAsUnread', () {
diff --git a/test/widgets/compose_box_test.dart b/test/widgets/compose_box_test.dart
index e02fd97a15..4a16db83fb 100644
--- a/test/widgets/compose_box_test.dart
+++ b/test/widgets/compose_box_test.dart
@@ -1080,6 +1080,32 @@ void main() {
       });
     });
 
+    group('in channel/topic narrow with archived channels', () {
+      void checkComposeBox({required bool isShown}) => checkComposeBoxIsShown(isShown,
+        bannerLabel: zulipLocalizations.errorBannerCannotPostInChannelLabel);
+
+      final narrowTestCases = [
+        ('channel', const ChannelNarrow(1)),
+        ('topic',   eg.topicNarrow(1, 'topic')),
+      ];
+
+      for (final (String narrowType, Narrow narrow) in narrowTestCases) {
+        testWidgets('error banner is shown in $narrowType narrow', (tester) async {
+          await prepareComposeBox(tester,
+            narrow: narrow,
+            streams: [eg.stream(streamId: 1, isArchived: true)]);
+          checkComposeBox(isShown: false);
+        });
+
+        testWidgets('compose box is shown in $narrowType narrow', (tester) async {
+          await prepareComposeBox(tester,
+            narrow: narrow,
+            streams: [eg.stream(streamId: 1, isArchived: false)]);
+          checkComposeBox(isShown: true);
+        });
+      }
+    });
+
     group('in channel/topic narrow according to channel post policy', () {
       void checkComposeBox({required bool isShown}) => checkComposeBoxIsShown(isShown,
         bannerLabel: zulipLocalizations.errorBannerCannotPostInChannelLabel);
diff --git a/test/widgets/inbox_test.dart b/test/widgets/inbox_test.dart
index 9fa5de1bf3..583af43881 100644
--- a/test/widgets/inbox_test.dart
+++ b/test/widgets/inbox_test.dart
@@ -118,17 +118,27 @@ void main() {
 
   /// Find a row with the given label.
   Widget? findRowByLabel(WidgetTester tester, String label) {
-    final rowLabel = tester.widgetList(
-      find.text(label),
-    ).firstOrNull;
-    if (rowLabel == null) {
-      return null;
+    final textFinder = find.text(label);
+    if (textFinder.evaluate().isNotEmpty) {
+      return tester.widget(
+        find.ancestor(
+          of: textFinder.first,
+          matching: find.byType(Row))
+      );
     }
 
-    return tester.widget(
-      find.ancestor(
-        of: find.byWidget(rowLabel),
-        matching: find.byType(Row)));
+    final richTextFinder = find.byWidgetPredicate((widget) =>
+      widget is RichText &&
+      widget.text.toPlainText().contains(label));
+    if (richTextFinder.evaluate().isNotEmpty) {
+      return tester.widget(
+        find.ancestor(
+          of: richTextFinder.first,
+          matching: find.byType(Row))
+      );
+    }
+
+    return null;
   }
 
   /// Find the all-DMs header element.
@@ -604,6 +614,22 @@ void main() {
           check(rectAfterTap).equals(rectBeforeTap);
         });
 
+        testWidgets('shows archived label for archived streams', (tester) async {
+          final stream = eg.stream(isArchived: true);
+          final subscription = eg.subscription(stream);
+          await setupPage(tester,
+            streams: [stream],
+            subscriptions: [subscription],
+            unreadMessages: [eg.streamMessage(stream: stream)]);
+          await tester.pumpAndSettle();
+          final headerRow = findStreamHeaderRow(tester, stream.streamId);
+          check(headerRow).isNotNull();
+          final archivedLabelFinder = find.descendant(
+            of: find.byWidget(headerRow!),
+            matching: find.text('(archived)'));
+          check(archivedLabelFinder).findsOne();
+        });
+
         // TODO check it remains collapsed even if you scroll far away and back
 
         // TODO check that it's always uncollapsed when it appears after being
diff --git a/test/widgets/message_list_test.dart b/test/widgets/message_list_test.dart
index 53ad1334ef..9e9d630d72 100644
--- a/test/widgets/message_list_test.dart
+++ b/test/widgets/message_list_test.dart
@@ -241,6 +241,22 @@ void main() {
         of: find.byType(MessageListAppBarTitle),
         matching: find.byIcon(ZulipIcons.mute))).findsOne();
     });
+
+    testWidgets('shows archived label in app bar for archived channels', (tester) async {
+      final archivedChannel = eg.stream(isArchived: true);
+      final message = eg.streamMessage(stream: archivedChannel, topic: 'topic');
+
+      await setupMessageListPage(tester,
+        narrow: ChannelNarrow(archivedChannel.streamId),
+        messages: [message],
+        streams: [archivedChannel],
+        subscriptions: [eg.subscription(archivedChannel)]);
+      final appBarFinder = find.byType(MessageListAppBarTitle);
+      check(appBarFinder).findsOne();
+      check(find.descendant(
+        of: appBarFinder,
+        matching: find.text("(archived)"))).findsOne();
+    });
   });
 
   group('presents message content appropriately', () {
@@ -1133,6 +1149,19 @@ void main() {
         await tester.pump();
         check(pushedRoutes).isEmpty();
       });
+
+      testWidgets('shows archived label for archived streams', (tester) async {
+        final stream = eg.stream(isArchived: true);
+        final message = eg.streamMessage(stream: stream, topic: 'topic');
+
+        await setupMessageListPage(tester,
+          narrow: const CombinedFeedNarrow(),
+          messages: [message],
+          streams: [stream],
+          subscriptions: [eg.subscription(stream)]);
+        await tester.pump();
+        check(findInMessageList("(archived)")).length.equals(1);
+      });
     });
 
     group('DmRecipientHeader', () {
diff --git a/test/widgets/subscription_list_test.dart b/test/widgets/subscription_list_test.dart
index a3fc13dac9..0728795c4f 100644
--- a/test/widgets/subscription_list_test.dart
+++ b/test/widgets/subscription_list_test.dart
@@ -95,6 +95,25 @@ void main() {
     check(isUnpinnedHeaderInTree()).isTrue();
   });
 
+  testWidgets('archived subscriptions are filtered out', (tester) async {
+    await setupStreamListPage(tester, subscriptions: [
+      eg.subscription(eg.stream(streamId: 1, isArchived: true), pinToTop: true),
+      eg.subscription(eg.stream(streamId: 2, isArchived: true), pinToTop: false),
+      eg.subscription(eg.stream(streamId: 3), pinToTop: true),
+      eg.subscription(eg.stream(streamId: 4), pinToTop: false),
+    ]);
+
+    check(getItemCount()).equals(2);
+    check(isPinnedHeaderInTree()).isTrue();
+    check(isUnpinnedHeaderInTree()).isTrue();
+
+    check(find.text('stream 1')).findsNothing();
+    check(find.text('stream 2')).findsNothing();
+
+    check(find.text('stream 3')).findsOne();
+    check(find.text('stream 4')).findsOne();
+  });
+
   group('subscription sorting', () {
     Iterable<int> listedStreamIds(WidgetTester tester) => tester
       .widgetList<SubscriptionItem>(find.byType(SubscriptionItem))