Marcia Tucker, the founding director of the New Museum of Contemporary Art, New York, reviews her work of the past twenty-two years

The new information technology has transformed traditional picture research

After leaving Berlin in 1937, Berggruen will be placing his collection - which will go on show this autumn - on a ten-year loan with the Berlin State Museums

Dube reacts angrily to Russian delays over restitution and responds to the opposition of Irina Antonova, veteran director of the Pushkin Museum