Brandenburg the Province of Brandenburg, again subdivided into the government regions of Frankfurt and Potsdam. In 1881, the City of Berlin was separated from the Province of Brandenburg. However, industrial towns ringing Berlin lay within Brandenburg, and the growth of the region's industrial economy brought an increase in the population of the province. The Province of Brandenburg had an area of and a population of 2.6 million (1925). After World War II, the Neumark, the part of Brandenburg east of the Oder–Neisse line, was transferred to Poland; and its native German population expelled. The remainder of the province became a state
Brandenburg Gate (Potsdam) and the other gates it was intended to prevent desertion and smuggling. Towards the end of the Seven Years' War, Frederick the Great had the old gate demolished and built, in its stead, this new Brandenburg Gate, as a symbol of his victory. For that reason the Brandenburg Gate resembles a Roman triumphal arch. Its prototype was the Arch of Constantine in Rome. The Roman influence of its architectural style can be seen, for example, in the double columns of Corinthian order as well as the design of the attic. A feature of the Brandenburg Gate is that it has