Tate Modern hosts Gerhard Richter retrospective
Gerhard Richter, 80, is widely regarded as one of the most important artists working today.
A major retrospective of the Dresden-born artist's work has opened at the Tate Modern in London, before moving on to Berlin and then Paris.
Gerhard Richter has produced remarkable images - often a mixture of photography and oil paint - for nearly half a century, confronting issues ranging from Germany's Nazi past to consumerism and the 9/11 attacks on the US.
David Hannah reports.