Ateneum Art Museum houses the largest collections of art in Finland with more than 20,000 works of art from the 1750s to the 1950s. The changing exhibitions are on display on the ground floor and in the exhibition halls on the second floor. Ateneum also organises various workshops, guided tours and other programme. The Ateneum building was designed by the architect Theodor Höijer and it was completed in 1887. Ateneum Art Museum is part of the Finnish National Gallery.