In the 1920s he made the design for the building of the Stockholm School of Economics (1925) and the Stockholm Concert Hall (1923–1926) at Hötorget Square.
Originally opened in 1933 as an underground tram stop, in 1950 it became the terminal of the first metro line running south to Hökarängen, it was again rebuilt in 1957 when the line north to Hötorget was opened.