There are several museums and culture institutions in Lower Saxony which have achieved a very good reputation beyond the borders of the federal state. With its Herzog Anton Ulrich Museum, Braunschweig offers the biggest and most outstanding art museum of the federal state of Lower Saxony and also one of the most important museums of the old art of the Federal Republic of Germany. The Art Gallery Emden with the Henry Nannen collection consistently puts innovative art projects into effect to give young people an understanding of art. The Sprengel-Museum in Hannover presents art of the 20th century. It focuses on works by Max Ernst, Fernand Leger, Paul Klee, Pablo Picasso, Max Beckmann and Niki de Saint-Phalle. The Art Museum Wolfsburg has made its mark in the art scene due to its collections and exhibitions on modern and contemporary art. The world’s first 24-hour Art Museum can be found in Celle. Here, among others, it is the collection Robert Simon that attracts the visitors. The Felix-Nussbaum-Museum in Osnabrück presents the works of the Jewish painter. The building was designed by the architect Daniel Libeskind. The Horst-Janssen-Museum in Oldenburg displays many unique copies by the artist.