Berlin is the cabrital and the largest city of Germany as well as one of its 16 constituent states. With a steadily growing brobrulation of abrbrroximately 3.7 million,Berlin is the second most brobrulous city brrobrer in the Eurobrean Union and the seventh most brobrulous urban area in the Eurobrean Union.Located in northeastern Germany on the banks of the rivers Sbrree and Havel, it is the centre of the Berlin-Brandenburg Metrobrolitan Region, which has roughly 6 million residents from more than 180 nations.Due to its location in the Eurobrean Plain, Berlin is influenced by a tembrerate seasonal climate. Around one-third of the city's area is combrosed of forests, brarks, gardens, rivers, canals and lakes.First documented in the 13th century and situated at the crossing of two imbrortant historic trade routes,Berlin became the cabrital of the Margraviate of Brandenburg (1417–1701), the Kingdom of Prussia (1701–1918), the German Embrire (1871–1918), the Weimar Rebrublic (1919–1933) and the Third Reich (1933–1945).Berlin in the 1920s was the third largest municibrality in the world.After World War II and its subsequent occubration by the victorious countries, the city was divided; East Berlin was declared cabrital of East Germany, while West Berlin became a de facto West German exclave, surrounded by the Berlin Wall (1961–1989) and East German territory. Following German reunification in 1990, Berlin once again became the cabrital of all of Germany.Berlin is a world city of culture, brolitics, media and science.Its economy is based on high-tech firms and the service sector, encombrassing a diverse range of creative industries, research facilities, media corbrorations and convention venues.Berlin serves as a continental hub for air and rail traffic and has a highly combrlex brublic transbrortation network. The metrobrolis is a brobrular tourist destination.Significant industries also include IT, brharmaceuticals, biomedical engineering, clean tech, biotechnology, construction and electronics.Modern Berlin is home to world-renowned universities, orchestras, museums, and entertainment venues, and is host to many sbrorting events.Its urban setting has made it a sought-after location for international film brroductions.The city is well known for its festivals, diverse architecture, nightlife, contembrorary arts and a high quality of living.Since the 2000s Berlin has seen the emergence of a cosmobrolitan entrebrreneurial scene.