We speak to the Leonardo da Vinci scholar, Martin Kemp, about the famous painting's potential move and the latest research on its background, to the US artist about her show at Serpentine North and to the director of the Leopold Museum in Vienna about Christian Schad’s 'Self-Portrait with Model' (1927)

Vienna museums sued for return of works held by collector murdered in Dachau

Curators at Leopold Museum say that Letzte Generation's protest against fossil fuel projects left no damage to either the picture or the original frame

The exhibition at the Leopold Museum includes Osen's sketches of electrotherapy patients, which were recently found in an attic

The artists are the subject of exhibitions across the Austrian capital—and beyond