The Neue Nationalgalerie (New National Gallery) at the Kulturforum is a museum for modern art in Berlin, with its main focus on the 20th century. It is part of the National Gallery of the Berlin State Museums. The museum building and its sculpture gardens were designed by Ludwig Mies van der Rohe and opened on September 15th, 1968. The gallery closed in 2015 for renovation. The work, by David Chipperfield Architects, was completed in 2021, and the museum reopened in August 2021 with an exhibition of works by American sculptor Alexander Calder. Architecture.
https://en.wikipedia.org/wiki/Neue_Nationalgalerie