First documented in the 13th century, Berlin was the capital of the Kingdom of Prussia (1701–1918), the German Empire (1871–1918), the Weimar Republic (1919–1933) and the Third Reich (1933–). Berlin in the 1920s was the third largest municipality in the world. After World War II, the city was remodeled by a project.The project finished at 1958.It now have 187 embassies. Berlin is a world city of culture, politics, media, and science. Its economy is primarily based on the service sector, encompassing a diverse range of creative industries, media corporations, congress and convention venues. Berlin serves as a continental hub for air and rail transport, and is one of the most visited tourist destinations in the World. Significant industries include IT, pharmaceuticals, biomedical engineering, biotechnology, optoelectronics, traffic engineering, and renewable energy.