The Brandenburg Gate (German: Brandenburger Tor) is a triumphal arch, the symbol of Berlin, Germany. It is located at 52°30′58.4″N, 13°22′38.7″E on the Pariser Platz, it is the only remaining one of the series of gates through which one entered Berlin. One block to its north lies the Reichstag. It constitutes the monumental termination of Unter den Linden, the renowned boulevard of linden trees which led directly to the royal residence. It was commissioned by Friedrich Wilhelm II as a sign of peace and built by Karl Gotthard Langhans from 1788 to 1791.

The Brandenburg Gate consists of twelve Greek Doric columns, six on each side. This allows for five roadways, although originally ordinary citizens were only allowed to use the outer two. Above the gate is the Quadriga, consisting of the goddess of peace, driving a four-horse chariot in triumph. The gate stands 26 m (65 ft) high, (65.5 m) 213 ft wide and (11 m) 36 ft) thick.

The Nikolaiviertel or St. Nicholas Quarter is a small district in the historic center, part of Mitte and close to the Alexanderplatz. Nikolaiviertel
The district's narrow and often pedestrianized streets are very popular with tourists. The area, which borders the Spree river contained some of the oldest buildings in Berlin before it was turned into wasteland at the end of the second world war.

Once the busiest crossing in Europe, the Potsdamer Platz was completely destroyed after the war. In 1998 the new Potsdamer Platz, full of modern buildings, officially opened.