Assuming non-North American responses are OK:

The PH Hamburg is built within the historic Levantehaus complex. I know that the area was extensively damaged by WW II bombing, so I don't know how much is "original" and how much was restored after the war.

Here's a site about some of the art inside the Levantehaus:

http://www.sculptor.ndirect.co.uk/html/levantehaus.html