The planetarium was invented by the German engineer Walther Bauersfeld of the Carl Zeiss Company in 1919, and the first projection-planetarium in the world was installed in the Deutsches Museum in München (Munich) 1923. Most of the German planetariums were destroyed during World War II. Today, nine major planetariums with dome diameters greater than 15m are in operation in the following cities in F.R. Germany; the numbers in brackets are the year of opening, the dome size and the seating capacity: West Berlin (1965; 20 m; 320), Bochum (1964; 20 m; 300), Hamburg (1933; 20.6 m; 270), Mannheim (1984; 20 m; 287), München (1925; 15 m; 156), Münster (1981; 20 m; 280), Nürnberg (1961; 18 m; 255), Stuttgart (1977; 20 m; 277), and Wolfsburg (1983; 15 m; 148).