The Lusthaus is a historic building in Prater park in the Leopoldstadt district of Vienna, Austria. It is located at the southeastern end of Prater Avenue, near the Freudenau racecourse. First mentioned in 1560 as Casa Verde, the green summer house served as a hunting lodge in Vienna's Prater, which was then a hunting ground. It was built in 1538, at the location where Prater Avenue met the Danube Canal. The Lusthaus was on the water until 1834, when the Danube Canal was moved.