diff --git a/README.md b/README.md
index 37caed4..0a6da15 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,10 @@
 Backend services for the
 [Data Access Tool UI](https://github.com/nsidc/data-access-tool-ui).
 
+<p align="center">
+  <img alt="High Level DAT architecture diagram" src="./doc/high_level_architecture.png" />
+</p>
+
 ## Level of Support
 
 This repository is fully supported by NSIDC. If you discover any problems or
diff --git a/doc/_quarto.yml b/doc/_quarto.yml
index ec7c971..36a35c6 100644
--- a/doc/_quarto.yml
+++ b/doc/_quarto.yml
@@ -10,6 +10,8 @@ website:
     left:
       - href: getting_started.md
         text: "Getting Started"
+      - href: architecture.md
+        text: "Architecture"
       - href: testing.md
         text: "Testing"
       - href: developing_with_edd.qmd
diff --git a/doc/architecture.md b/doc/architecture.md
new file mode 100644
index 0000000..d167e37
--- /dev/null
+++ b/doc/architecture.md
@@ -0,0 +1 @@
+![High-level software architecture for the DAT. The DAT UI is embedded in dataset-specific pages powered by Drupal. Drupal provides the DAT with the dataset name and version.](high_level_architecture.png)
diff --git a/doc/cires_rendezvous_poster.jpg b/doc/cires_rendezvous_poster.jpg
new file mode 100644
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diff --git a/doc/cires_rendezvous_poster.md b/doc/cires_rendezvous_poster.md
index 7e8571b..54fc5d6 100644
--- a/doc/cires_rendezvous_poster.md
+++ b/doc/cires_rendezvous_poster.md
@@ -2,7 +2,6 @@
 
 This is a landing page for the
 [CIRES Rendezvous](https://ciresevents.colorado.edu/rendezvous/) 2025 poster.
-More content will be added here shortly!
 
 ## Abstract
 
@@ -27,6 +26,10 @@ also provides information about the open source software that defines and powers
 the DAT, opening the possibility for collaboration with the open source
 community.
 
+## Poster
+
+![CIRES Rendezvous 2025 poster](cires_rendezvous_poster.jpg)
+
 ## Try out the Data Access Tool
 
 Below are some example links to dataset-specific instances of the Data Access
diff --git a/doc/high_level_architecture.png b/doc/high_level_architecture.png
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