Berlin is not only the Brandenburg Gate or the Berlin Wall. Although the monumental buildings from the times of the Kingdom of Prussia and Imperial Germany are the most striking in the city, in Nikolaiviertel, you can see the medieval roots of the city. However, it is impossible to run away from recent history. While visiting the Reichstag, Bebelplatz, Kaiser-Wilhelm Church or the East Side Gallery, I unknowingly recalled the bloody events of the 20th century German history.