diff --git a/README.md b/README.md
index ea506cd3a..7745c70a5 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+# Archival Note
+
+This repo contains support for the "standalone Glimmer / GlimmerX / GlimmerJS" project that spun out from EmberJS. The parts of it that were mainstreamed back into Ember have moved into https://github.com/emberjs/ember.js/ and the rest is archived.
+
 # Glimmer.js
 
 Welcome to Glimmer.js! Glimmer.js is actually a made up of lots of small