The boys, Marc, and my son Amedeo enjoyed the Technikmuseum. I did too. My dad was a Navy pilot in WWII (My Father’s History – Commander Theodore Hechler, Jr. (US Navy Retired) (sherryfelix.com)).
I wanted to see the Bauhaus (Wikipedia) but the timed entry dissuaded me.
The two statues are of Kurt Weill (Wikipedia) and Bertolt Brecht (Wikipedia). I associate them with the famous singer Lotte Lenya (Wikipedia). Play the Moon above Alabama for an example.