diff --git a/ChangeLog b/ChangeLog
index 2aecee974b4e41442100fbb530a01ccb8c6dbe54..290c2b2257ed2568cd8aeaca41e2818a59caca0b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,13 @@
+2022-01-18 Oliver Lemke <oliver.lemke@uni-hamburg.de>
+
+	* ARTS-CAT-DATA-2
+
+	* lines/: Moved line catalog to subdir.
+
+	* lines/00ChangeLog: Add log to document catalog changes.
+
 2021-11-24 Richard Larsson <richard.larsson@uni-hamburg.de>
+
 	* ARTS-CAT-DATA-1
 
 	* Repository link:
diff --git a/lines/00ChangeLog b/lines/00ChangeLog
new file mode 100644
index 0000000000000000000000000000000000000000..9f2702caa865e4de3d6d6c512db461d0bff46b4c
--- /dev/null
+++ b/lines/00ChangeLog
@@ -0,0 +1,10 @@
+2021-11-24 Richard Larsson <richard.larsson@uni-hamburg.de>
+
+	* ARTS-CAT-DATA-LINES-1
+
+	* Repository link:
+	https://github.com/atmtools/arts-cat/tree/0caedb284482dacec823b14db257ce94d1bef3e1
+
+	* Based on data downloaded from hitran.org 2021-11-15
+
+	* This follows the same step as the then existing arts-xml-data/spectroscopy/Artscat
diff --git a/C2H2-1221.xml b/lines/C2H2-1221.xml
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rename from SO2-646.xml
rename to lines/SO2-646.xml
diff --git a/SO3-26.xml b/lines/SO3-26.xml
similarity index 100%
rename from SO3-26.xml
rename to lines/SO3-26.xml