diff --git a/changelog.d/2782.misc b/changelog.d/2782.misc
new file mode 100644
index 0000000000..dc20050369
--- /dev/null
+++ b/changelog.d/2782.misc
@@ -0,0 +1 @@
+Collapse successive ACLs events in room timeline
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MergedHeaderItemFactory.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MergedHeaderItemFactory.kt
index 99a026a0cf..76ed024370 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MergedHeaderItemFactory.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MergedHeaderItemFactory.kt
@@ -16,6 +16,7 @@
 
 package im.vector.app.features.home.room.detail.timeline.factory
 
+import im.vector.app.R
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.extensions.prevOrNull
 import im.vector.app.features.home.AvatarRenderer
@@ -26,10 +27,10 @@ import im.vector.app.features.home.room.detail.timeline.helper.TimelineEventVisi
 import im.vector.app.features.home.room.detail.timeline.helper.canBeMerged
 import im.vector.app.features.home.room.detail.timeline.helper.isRoomConfiguration
 import im.vector.app.features.home.room.detail.timeline.item.BasedMergedItem
-import im.vector.app.features.home.room.detail.timeline.item.MergedMembershipEventsItem
-import im.vector.app.features.home.room.detail.timeline.item.MergedMembershipEventsItem_
 import im.vector.app.features.home.room.detail.timeline.item.MergedRoomCreationItem
 import im.vector.app.features.home.room.detail.timeline.item.MergedRoomCreationItem_
+import im.vector.app.features.home.room.detail.timeline.item.MergedSimilarEventsItem
+import im.vector.app.features.home.room.detail.timeline.item.MergedSimilarEventsItem_
 import im.vector.app.features.home.room.detail.timeline.tools.createLinkMovementMethod
 import org.matrix.android.sdk.api.extensions.orFalse
 import org.matrix.android.sdk.api.query.QueryStringValue
@@ -82,7 +83,7 @@ class MergedHeaderItemFactory @Inject constructor(private val activeSessionHolde
                                                    event: TimelineEvent,
                                                    eventIdToHighlight: String?,
                                                    requestModelBuild: () -> Unit,
-                                                   callback: TimelineEventController.Callback?): MergedMembershipEventsItem_? {
+                                                   callback: TimelineEventController.Callback?): MergedSimilarEventsItem_? {
         val mergedEvents = timelineEventVisibilityHelper.prevSameTypeEvents(
                 items,
                 currentPosition,
@@ -122,23 +123,31 @@ class MergedHeaderItemFactory @Inject constructor(private val activeSessionHolde
                 collapsedEventIds.removeAll(mergedEventIds)
             }
             val mergeId = mergedEventIds.joinToString(separator = "_") { it.toString() }
-            val attributes = MergedMembershipEventsItem.Attributes(
-                    isCollapsed = isCollapsed,
-                    mergeData = mergedData,
-                    avatarRenderer = avatarRenderer,
-                    onCollapsedStateChanged = {
-                        mergeItemCollapseStates[event.localId] = it
-                        requestModelBuild()
-                    }
-            )
-            MergedMembershipEventsItem_()
-                    .id(mergeId)
-                    .leftGuideline(avatarSizeProvider.leftGuideline)
-                    .highlighted(isCollapsed && highlighted)
-                    .attributes(attributes)
-                    .also {
-                        it.setOnVisibilityStateChanged(MergedTimelineEventVisibilityStateChangedListener(callback, mergedEvents))
-                    }
+            val summaryTitleResId = when (event.root.getClearType()) {
+                EventType.STATE_ROOM_MEMBER     -> R.plurals.membership_changes
+                EventType.STATE_ROOM_SERVER_ACL -> R.plurals.notice_room_server_acl_changes
+                else                            -> null
+            }
+            summaryTitleResId?.let { summaryTitle ->
+                val attributes = MergedSimilarEventsItem.Attributes(
+                        summaryTitleResId = summaryTitle,
+                        isCollapsed = isCollapsed,
+                        mergeData = mergedData,
+                        avatarRenderer = avatarRenderer,
+                        onCollapsedStateChanged = {
+                            mergeItemCollapseStates[event.localId] = it
+                            requestModelBuild()
+                        }
+                )
+                MergedSimilarEventsItem_()
+                        .id(mergeId)
+                        .leftGuideline(avatarSizeProvider.leftGuideline)
+                        .highlighted(isCollapsed && highlighted)
+                        .attributes(attributes)
+                        .also {
+                            it.setOnVisibilityStateChanged(MergedTimelineEventVisibilityStateChangedListener(callback, mergedEvents))
+                        }
+            }
         }
     }
 
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/TimelineDisplayableEvents.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/TimelineDisplayableEvents.kt
index bcccbc9f7c..53a9fbbaea 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/TimelineDisplayableEvents.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/TimelineDisplayableEvents.kt
@@ -56,7 +56,8 @@ object TimelineDisplayableEvents {
 }
 
 fun TimelineEvent.canBeMerged(): Boolean {
-    return root.getClearType() == EventType.STATE_ROOM_MEMBER
+    return root.getClearType() == EventType.STATE_ROOM_MEMBER ||
+            root.getClearType() == EventType.STATE_ROOM_SERVER_ACL
 }
 
 fun TimelineEvent.isRoomConfiguration(roomCreatorUserId: String?): Boolean {
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/MergedMembershipEventsItem.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/MergedSimilarEventsItem.kt
similarity index 91%
rename from vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/MergedMembershipEventsItem.kt
rename to vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/MergedSimilarEventsItem.kt
index e19dc33fff..f012ca6cdc 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/MergedMembershipEventsItem.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/MergedSimilarEventsItem.kt
@@ -20,6 +20,7 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.ImageView
 import android.widget.TextView
+import androidx.annotation.PluralsRes
 import androidx.core.view.children
 import com.airbnb.epoxy.EpoxyAttribute
 import com.airbnb.epoxy.EpoxyModelClass
@@ -27,7 +28,7 @@ import im.vector.app.R
 import im.vector.app.features.home.AvatarRenderer
 
 @EpoxyModelClass(layout = R.layout.item_timeline_event_base_noinfo)
-abstract class MergedMembershipEventsItem : BasedMergedItem<MergedMembershipEventsItem.Holder>() {
+abstract class MergedSimilarEventsItem : BasedMergedItem<MergedSimilarEventsItem.Holder>() {
 
     override fun getViewStubId() = STUB_ID
 
@@ -37,7 +38,7 @@ abstract class MergedMembershipEventsItem : BasedMergedItem<MergedMembershipEven
     override fun bind(holder: Holder) {
         super.bind(holder)
         if (attributes.isCollapsed) {
-            val summary = holder.expandView.resources.getQuantityString(R.plurals.membership_changes, attributes.mergeData.size, attributes.mergeData.size)
+            val summary = holder.expandView.resources.getQuantityString(attributes.summaryTitleResId, attributes.mergeData.size, attributes.mergeData.size)
             holder.summaryView.text = summary
             holder.summaryView.visibility = View.VISIBLE
             holder.avatarListView.visibility = View.VISIBLE
@@ -66,6 +67,7 @@ abstract class MergedMembershipEventsItem : BasedMergedItem<MergedMembershipEven
     }
 
     data class Attributes(
+            @PluralsRes val summaryTitleResId: Int,
             override val isCollapsed: Boolean,
             override val mergeData: List<Data>,
             override val avatarRenderer: AvatarRenderer,
diff --git a/vector/src/main/res/values/strings.xml b/vector/src/main/res/values/strings.xml
index 69a1c53d1c..e60762d03f 100644
--- a/vector/src/main/res/values/strings.xml
+++ b/vector/src/main/res/values/strings.xml
@@ -81,6 +81,10 @@
 
     <string name="notice_room_server_acl_updated_title">%s changed the server ACLs for this room.</string>
     <string name="notice_room_server_acl_updated_title_by_you">You changed the server ACLs for this room.</string>
+    <plurals name="notice_room_server_acl_changes">
+        <item quantity="one">%d server ACLs change</item>
+        <item quantity="other">%d server ACLs changes</item>
+    </plurals>
     <string name="notice_room_server_acl_updated_banned">• Servers matching %s are now banned.</string>
     <string name="notice_room_server_acl_updated_was_banned">• Servers matching %s were removed from the ban list.</string>
     <string name="notice_room_server_acl_updated_allowed">• Servers matching %s are now allowed.</string>