The Klassik Stiftung Weimar (Classical Foundation Weimar) is one of the largest and most significant cultural institutions in Germany. It owns more than 20 museums, palaces, historic houses and parks, as well as literary and art collections, a number of which are World Heritage sites. It focuses on the Weimar Classicism period, but also covers 19th and 20th century art and culture with properties associated with Franz Liszt, Friedrich Nietzsche, Henry van de Velde and the Bauhaus.