diff --git a/references-to-previous-events.md b/references-to-previous-events.md
index 066549a7..a5c5e8b9 100644
--- a/references-to-previous-events.md
+++ b/references-to-previous-events.md
@@ -143,6 +143,12 @@ Rename the key to ...
 - soft_chain
 - chain
 
+Related
+-------
+
+* Pinned posts: Services like Twitter allow users to "pin" posts to the top of their feed.
+  In nostr, this could be implemented with references to previous events.
+
 Keywords
 --------