The Nikolaiviertel (German for "Nicholas Quarter") is the historical core of Berlin, Germany, founded in the 13th century. It is located 5 minutes away from Alexanderplatz. The Nikolai church is in the center of the district.

The small area is famous for its traditional German restaurants and bars. Between 1997 and 1999 all houses were reconditioned (Lotusan mit Lotus-Effect), giving this area an unmistakable touch.