The German Maritime Museum is a museum in Bremerhaven, Germany. It is part of the Gottfried Wilhelm Leibniz Scientific Community. The main museum building was opened on 5 September 1975 by then-president of Germany Walter Scheel, though scientific work already had started in 1971. The museum consists of the building planned by Hans Scharoun as well as several museum ships in the Old Harbour of Bremerhaven, including the Seute Deern windjammer.