diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,2 +1,29 @@
-# Fediversity
+# The Fediversity project
 
+This repository contains all the code and code-related files having to do with
+[the Fediversity project](https://fediversity.eu/), with the notable exception
+of [NixOps4 that is hosted on GitHub](https://github.com/nixops4/nixops4).
+
+## Content of this repository
+
+Most of the directories in this repository have their own README going into more
+details as to what they are for. As an overview:
+
+- [`deployment/`](./deployment) contains bits and pieces having to do with
+  auto-deployment of test VMs on a private Proxmox.
+
+- [`infra/`](./infra) contains the configurations for the various VMs that are
+  in production for the project, for instance the Git instances or the Wiki.
+
+- [`matrix/`](./matrix) contains everything having to do with setting up a
+  fully-featured Matrix server.
+
+- [`server/`](./server) contains the configuration of the VM hosting the
+  website. This should be integrated into `infra/` shortly in the future, as
+  tracked in https://git.fediversity.eu/Fediversity/Fediversity/issues/31.
+
+- [`services/`](./services) contains our effort to make Fediverse applications
+  work seemlessly together in our specific setting.
+
+- [`website/`](./website) contains the framework and the content of [the
+  Fediversity website](https://fediversity.eu/)