I surveyed this building for the house number (because of the fixme), but could not find any marked number. There are mailboxes, but without numbers. The numbers 2 and 6 on adjacent buildings are correct, so it seems likely that this is indeed number four.

I'm not sure how to handle this, should we just remove this fixme?

There is no polizei outside here. Maybe inside the stadhaus? I could not check, it was closed on sunday.