diff --git a/Collectively-owned-instances.md b/Collectively-owned-instances.md
index 931c39d..6bef4ea 100644
--- a/Collectively-owned-instances.md
+++ b/Collectively-owned-instances.md
@@ -35,6 +35,7 @@ Where the instance (or the fediverse) is the/a main purpose of the entity.
 * [mastodon.acc.sunet.se](https://mastodon.acc.sunet.se) - Academic Computer Club in Umeå, SE, EU *(Mastodon)*
 * [pouet.chapril.org](https://pouet.chapril.org) - Chapril/April, free software association, FR, EU *(Mastodon)*
 * [sociale.network](https://sociale.network) - Altrinformazione and Peacelink associations, IT, EU *(Mastodon)*
+* [social.bau-ha.us](https://social.bau-ha.us) - [Maschinenraum Weimar](https://blog.maschinenraum.tk/) (physically hosted by Bauhaus-Universität Weimar, part of the student council), DE, EU *(Mastodon)*
 
 Nowadays more may be listed on https://joinmastodon.org/servers