landmark designed by Karl Friedrich Schinkel, was ruined in the war; between 1979 and 1986 it was restored, and it was then reopened in September 1987, as part of the celebrations of Berlin's 750th anniversary, as an annexe of the National Gallery displaying 19th-century sculpture. There is a Schinkel museum in the gallery. Following German reunification, the old building was extensively renovated and the new building is now used for 20th-century art and the old building for 19th-century art. In 1996, while the Alte Nationalgalerie was still being slowly renovated, two further exhibition spaces were added for modern art. In September, the Berggruen Museum, housing Heinz Berggruen's collection of modern classics, especially focussed on Picasso, opened in the western of a pair of neoclassical buildings opposite the Charlottenburg Palace, like the Alte Nationalgalerie designed by Friedrich August Stüler as realisations of sketches by Frederick William IV; it had housed the West Berlin Museum of Antiquities until that collection was returned to Museum Island after German reunification. Berggruen initially leased the collection to the Berlin State Museums for a ten-year period, but in 2000 sold it to them for a small fraction of its assessed value. In November, the Hamburger Bahnhof, formerly a museum of technology but ruined in the war, opened after a six-year renovation as the Museum für Gegenwart, housing contemporary art, initially most from Erich Marx's collection. In 2008, the Scharf-Gerstenberg Collection of 20th-century art opened in the eastern Stüler building, which had housed the Egyptian Collection until it moved back to Museum Island. The collection is on a ten-year lease from the Stiftung Sammlung Dieter Scharf zur Erinnerung an Otto Gerstenberg (foundation of the Dieter Scharf collection in remembrance of Otto Gerstenberg), which focusses on the fantastic and the surreal and was built by Dieter Scharf based on some of the works in his grandfather Otto Gerstenberg's collection. In December 2011, it was announced that the Old Masters currently displayed in the Gemäldegalerie in the Kulturforum would be moved out to make way for a representative permanent exhibition of modern art, for which the Neue Nationalgalerie does not have adequate space. Directors 1874–1895: Max Jordan 1896–1908: Hugo von Tschudi 1909–1933: Ludwig Justi 1933–1937: Eberhard Hanfstaengl 1937–1950: Paul Ortwin Rave 1950–1957: Ludwig Justi 1957–1964: Leopold Reidemeister 1965–1966: Stefan Waetzold 1967–1974: Werner Haftmann 1974–1975: Wieland Schmied 1975–1997: Dieter Honisch 1999–2008: Peter-Klaus Schuster 2008–2020: Udo Kittelmann (with Joachim Jäger as