ens of suburban cities, villages, and estates around Berlin into an expanded city. This new area encompassed Spandau and Charlottenburg in the west, as well as several other areas that are now major municipalities. After this expansion, Berlin had a population of around four million. During the Weimar era, Berlin became internationally renowned as a center of cultural transformation, at the heart of the Roaring Twenties.
On 30 January 1933, Adolf Hitler and the Nazi Party came to power. Nazi rule destroyed Berlin's Jewish community, which had numbered 170,000 before 1933. After Kristallnacht in 1938, thousands of the city's Jews were imprisoned in the nearby Sachsenhausen concentration camp or, in early 1943, were shipped to death camps, such as Auschwitz. During World War II, large parts of Berlin were destroyed in the 1943�45 air raids and during the Battle of Berlin. Among the hundreds of thousands who died during the Battle for Berlin, an estimated 125,000 were civilians. After the end of the war in Europe in 1945, Berlin received large numbers of refugees from the Eastern provinces. The victorious powers divided the city into four sectors, analogous to the occupation zones into which Germany was divided. The sectors of the Western Allies (the United States, the United Kingdom and France) formed West Berlin, while the Soviet sector formed East Berlin.
All four Allies shared administrative responsibilities for Berlin. However, in 1948, when the Western Allies extended the currency reform in the Western zones of Germany to the three western sectors of Berlin, the Soviet Union imposed a blockade on the access routes to and from West Berlin, which lay entirely inside Soviet-controlled territory. The Berlin airlift, conducted by the three western Allies, overcame this blockade by supplying food and other supplies to the city from 24 June 1948 to 11 May 1949. In 1949, the Federal Republic of Germany was founded in West Germany and eventually included
