• Off the grid: a messier side to Mondrian
• Picasso’s obsession with El Greco
• An interview with Isaac Julien
• How Gio Ponti jazzed up Padua
Plus: William Kent’s heavenly ceilings, New York’s terrible new skyscrapers, the market’s obsession with young painters, the artists who channel their inner child, and reviews of Walter Sickert, Raphael and Winslow Homer
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UK museums are hamstrung by outdated laws around restitution.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