Notes The first studio construction dates back to 1931 (music and radio play studio), with architects Eibink and Snellebrand. By 1939, this studio was already in need of expansion. After 1945 expansion plans were considered. Of these, the technical wing (first phase) was completed in 1958. The second phase included studios 5, 6, 7 and 8 respectively a music studio, a radio play studio, a music studio and a cabaret music studio with 200 seats. The second phase was completed in 1961. The third phase included plans for a great hall and foyer, implemented in 1966-1969.