The two main buildings of Bauhaus University at Marienstraße are icons of 20th-century early-modern architecture. Both were built by Henry van de Velde between 1904 and 1911. They mark the transition from older Historicism and Art Nouveau to the new international modern style in Germany by their functional forms (e. g. skylights for better working conditions inside). The German National Theatre at Theaterplatz was built in 1906/07 in neo-classicist forms. Two predecessors were in use after 1779 and 1825 as ducal court theatres during Weimar's golden age. In 1919, the Weimar National Assembly developed the Weimar Constitution in this theatre. The Gauforum at Weimarplatz is a Roman-fascist style representative government district between the city centre and the main station. This Gauforum, designed by Hermann Giesler, was the only realized Nazi government district outside Berlin (whereas there were plans for all German state capitals). Today it hosts the Thuringian Administration State Department. The Park an der Ilm is the city's largest park along Ilm river between the ducal palace and the district of Oberweimar. It was established between 1778 and 1833 and is an English landscape garden today, part of UNESCO world heritage. Sights inside the park are Goethe's garden house (1690s) and Römisches Haus (in the style of a Roman temple, 1790s). The Historic Cemetery at Karl-Haußknecht-Straße was opened in 1818 and hosts the graves of Goethe, Schiller and many other famous people from Weimar. The Goethe-Schiller-Denkmal at Theaterplatz is the most famous memorial in Weimar. It was made by Ernst Rietschel between 1852 and 1857 and is dedicated to Goethe and Schiller, the most important poets of German classical literature. A rather unknown monument is the Lenin-light-box inside the theatre hall "La Redoute". It's a copy of a stained window by Alexander Leonidovich Korolev that shows Lenin in Petrograd. (today: St. Petersburg). Events The Onion Market (Weimarer Zwiebelmarkt) is an annual festival held in October in Weimar and it is Thuringia's largest festival. The festival is held over 3 days and approximately 500 stalls and more than 100 stage performances are put up across the city. Weimar first celebrated the Onion Market in 1653. Stalls typically offer onion plaits, themed arts and crafts and numerous onion-based foods, including onion cakes, onion soups and onion breads. The festival also hosts numerous beer gardens, live music, fairground attractions and a Ferris wheel. There are several clubs with live music once or