Berlin is the capital city and one of sixteen states of Germany. With a population of 3.4 million within its city limits, Berlin is the country’s largest city. It is the second most populous city and the ninth most populous urban area in the European Union. Located in northeastern Germany, it is the centre of the Berlin-Brandenburg metropolitan area, comprising 5 million people from over 190 nations. After World War II, the city was divided; East Berlin became the capital of East Germany while West Berlin became a Western enclave, surrounded by the Berlin Wall from 1961-1989. Following German reunification in 1990, the city regained its status as the capital of all Germany.