The Deutcher Dom was originally built in the 18th century to be the diocescan home of the Protestant-Reformed Church of Berlin. Destroyed in WWII, it was eventually rebuilt, finally re-opening in 1993. The building now serves as an regional history center.
The dome of the Dom is a duplicate of the tower of the Französischer (or French) Dom on the opposite side of the square. (Aside from their towers, the buildings are actually quite different.) When I was in Berlin in November 2004, the Französischer Dom was shrouded in scaffolding, undergoing restoration, so I didn't take a snapshot of it. But I'm sure that when finished the Gendamenmarkt will be even "smarter" than it already is.

