diff --git a/README.md b/README.md
index a244d26..688c86d 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,12 @@ Stacks (all deployed by `cdk deploy --all` / the CD workflow):
 | `seahaven-backup` | us-east-1 | Primary AWS Backup vault + plan + role (C-7) |
 | `seahaven-backup-offsite` | us-west-2 | Governance-locked offsite copy vault (C-7) |
 
+## Documentation
+
+The canonical map of Sea Haven's AWS infrastructure lives in Confluence. This project's `seahaven-account-baseline`, `seahaven-backup`, and `seahaven-backup-offsite` stacks are represented there as Mermaid subgraphs.
+
+- **[AWS Architecture Map](https://seahaven.atlassian.net/wiki/spaces/IT/pages/1540098)** (Confluence, IT space, page 1540098)
+
 ## What it deploys
 
 ### CloudTrail (audit finding C-1)