Hermann Tietz

  

I don't often have enough to go on to research my photos, but every once in a while.   Take a look at the top of the print, and the name "HERMANN TIETZ" can be seen.  Hermann Tietz was a German-Jewish businessman.  He was born in 1837 and died in 1907.  He and his brothers, Oskar, and Leonard founded a chain of department stores in Germany.  In 1900, the largest store in the chain was opened in Berlin. In 1934, all Tietz holdings, both department stores and factories were Aryanized and a forced sale was made to rival Georg Karg, who rebranded the stores as Hertie Department Stores. 

The words (at least the second and third word) on the bus in the foreground translate as 
Stranger Tours.  Special tours for first-time visitors to Berlin, perhaps.