Hallo;
Maps can be bought from the Kartenmeister website. This link will take
you to Zempelburg.
http://www.kartenmeister.com/preview/City.asp?CitNum=18644
Click on 'Buy Map of this Location' to see that three maps of different
scales are available. The largest scale maps are of a high detail and
usually show individual buildings.
Regards,
David Roepke