Brandenburg Gate after the Thirty Years' War and a century before the gate was constructed, Berlin was a small walled city within a star fort with several named gates: Spandauer Tor, St. Georgen Tor, Stralower Tor, Cöpenicker Tor, Neues Tor, and Leipziger Tor "(see map)". Relative peace, a policy of religious tolerance, and status as capital of the Kingdom of Prussia facilitated the growth of the city. The Brandenburg Gate was not part of the old Berlin Fortress, but one of 18 gates within the Berlin Customs Wall (), erected in the 1730s, including the old fortified city and many of its
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