Architects Kees Dam, Wilhelm Holzbauer and the city of Amsterdam commissioned a group of artists to make proposals for the new combination city hall. Each artist was free to pick a location in or around the buildings. Lucien den Arend chose for the entrance area in front of the main opera and music theater entrance as well as the inner court, which has a visual connection with this exterior space.
The two geometrical constructions align with the perpendicular volumes of the architecture. The tabgent diameters are in line and stress the length of the inner court.