Complex sentence: In 1926 he created the State Regional Museum of Danzig History in Danzig-Oliva which he led till 1945 and which was later responsible for pursuing studies on direct requests by SS Reichsfuhrer Heinrich Himmler.
Split into simpler sentences: In 1926 he created the State Regional Museum of Danzig History in Danzig-Oliva which he led until 1945. It was responsible for pursuing studies on direct requests from SS Reichsfuhrer Heinrich Himmler.