• The silhouette films of Lotte Reiniger
• Poussin and the art of the dance
• Minerals, gems and museums
• An interview with Richard Estes
Plus: a day at the Carnavalet in Paris, the romance of Scotch Baronial houses, at the Frank Gehry-designed Luma Arles – and a preview of Frieze Masters
How to give back looted objects
UK museums are hamstrung by outdated laws around restitution. It’s time for politicians to end the impasse and give them greater autonomy over their collections