The Klassik Stiftung Weimar (roughly "Weimar Classicism Foundation") 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 (most famously associated with Johann Wolfgang Goethe and Friedrich Schiller), but also covers 19th and 20th century art and culture with properties associated