Berlin is the capital and the biggest city of Germany .
It has a population of about 3.5 million and extends over 889 square kilometers. Historical Note Berlin was the capital of Prussia until 1945 and the capital of Germany between 1871 and 1945 and again since the reunification of Germany on October 3, 1990. Between 1949 and 1990, it was divided into East Berlin, the capital of the German Democratic Republic, and West Berlin.