The National Gallery () in Berlin, Germany, is a museum for art of the 19th, 20th and 21st centuries. It is part of the Berlin State Museums. From the Alte Nationalgalerie, which was built for it and opened in 1876, its exhibition space has expanded to include five other locations. The museums are part of the Berlin State Museums, owned by the Prussian Cultural Heritage Foundation. Locations The holdings of the National Gallery are currently shown in five locations: Alte Nationalgalerie: 19th-century art, on Museum Island Neue Nationalgalerie: 20th-century art, at the Kulturforum. The building, designed by Ludwig Mies van der Rohe, opened on 15 September 1968. Berggruen Museum: in Charlottenburg, showing classics of 20th-century modern art collected by Heinz Berggruen; added to the National Gallery in 1996. Scharf-Gerstenberg Collection: in Charlottenburg, showing 20th-century art from French Romanticism to Surrealism; added to the National Gallery in 2008. Hamburger Bahnhof: Museum für Gegenwart, contemporary art; added to the National Gallery in 1996. Friedrichswerder Church: 19th-century sculpture, a church designed by Karl Friedrich Schinkel, opened as an annexe of the National Gallery in September 1987. In 2012 the building was closed indefinitely owing to structural damage. History Planning, foundation and construction of the original building There was long discussion of the desirability of establishing a national gallery in Berlin, particularly during the period of revolutionary nationalism around 1848, and it became an increasingly serious proposition from 1850, when publications appeared advocating it. From the start it was bound up with the ambitions of Prussia and the wish for Berlin to become a capital of world renown. The decision was finally taken in 1861, after the death of the banker and art patron Joachim Heinrich Wilhelm Wagener, who bequeathed his extensive collection (262 artworks) to the then Prince Regent, the future King William I, in the hope of catalysing the formation of a gallery of "more recent" art. The collection was initially known as the Wagenersche und Nationalgalerie (Wagener and National Gallery) and was housed in the buildings of the Prussian Academy of Arts. Friedrich August Stüler began working on a design for a gallery building in 1863, based on a sketch by William I's father, King Frederick William IV of Prussia. Two years and two failed plans later, his third proposal was finally accepted. Stüler died before planning was completed and Carl Busse handled the remaining details in 1865. In 1866, by