diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..2884c09a3b563b55446b841533da2a32101e9188
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "BuildingSim/TEASER"]
+	path = BuildingSim/TEASER
+	url = https://github.com/RWTH-EBC/TEASER
+[submodule "BuildingSim/BESMod"]
+	path = BuildingSim/BESMod
+	url = https://github.com/RWTH-EBC/BESMod.git
diff --git a/BuildingSim/BESMod b/BuildingSim/BESMod
new file mode 160000
index 0000000000000000000000000000000000000000..484a11373afc1cb74bb9a680e93c2e484f956df7
--- /dev/null
+++ b/BuildingSim/BESMod
@@ -0,0 +1 @@
+Subproject commit 484a11373afc1cb74bb9a680e93c2e484f956df7
diff --git a/BuildingSim/TEASER b/BuildingSim/TEASER
new file mode 160000
index 0000000000000000000000000000000000000000..beb16a3f5e3d7cc8cf38b06b90b85a05ebb76f1a
--- /dev/null
+++ b/BuildingSim/TEASER
@@ -0,0 +1 @@
+Subproject commit beb16a3f5e3d7cc8cf38b06b90b85a05ebb76f1a