The council of La Chaux-de-Fonds, in canton Neuchâtel, had previously refused to repatriate the painting in 2009, but instead put a plaque next to the painting acknowledging its ownership history.

“The era of the IRL [In Real Life]-only art fair is over,” declares Iwan Wirth, co-founder of global gallery Hauser & Wirth. But write off in-person events at your peril. Against all ...