Impressions from Berlin

We spent a few days in wintery Berlin, and got to see a lot of different quarters while looking at different locations and meeting friends. The city is full of history, beautifully restored buildings, and lots of interesting architecture to discover, but I guess January is not really the best time to explore Berlin...
pictures:
1, Deutsches Historisches Museum Berlin and Fernsehturm
2, Berlin Wall
3, Museumsinsel (Bode Museum)
4, Friedrichshain Südkiez