Neil MacGregor examines how the Nazis attacked art they viewed as 'entartet' - degenerate.
He charts how Goebbels, Hitler's propaganda minister, led a process designed to purify all German culture, including books, music, paintings and pottery.
The programme focuses on a vase created by Grete Marks, with an evident debt to Chinese ceramics, and a loose brush-splashed glaze suggestive of modernist painting. Goebbels condemned this vase in his newspaper Der Angriff - The Attack. Grete Marks, who was Jewish and had trained at the Bauhaus, left Germany for England.
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