Well i was thinking about the Museumsinsel but its seems half is allways closed, do to ongoing restoration.
Brandenburger Tor and Reichstag are probably a must tough.
Historical sights are the best, but if possible, free from any underlining and local traumas. My brothers fiance would probably like Charlottenburg or some other Schloss, if it fits in the tight schedule.
We also dont need to see "urban culture" and bohemians as sights.
