diff --git a/.gitmodules b/.gitmodules
index 48b96ec..9d91f17 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "sose2020/num/hdnum"]
 	path = sose2020/num/hdnum
 	url = https://parcomp-git.iwr.uni-heidelberg.de/Teaching/hdnum
+[submodule "ws2020/theo/lectures"]
+	path = ws2020/theo/lectures
+	url = gitea:christian/theo-lecture
diff --git a/ws2020/theo/lectures b/ws2020/theo/lectures
new file mode 160000
index 0000000..c730c10
--- /dev/null
+++ b/ws2020/theo/lectures
@@ -0,0 +1 @@
+Subproject commit c730c108521ad79dee38201b3059a7ccfd97fb1b