From Lorraine O’Grady’s photocollages from the 1990s at Alexander Gray Associates to Kiyan Williams’s deep-fried American Flags at Lyles & King, these are the must-see shows
From Jumana Manna's solo exhibition at M HKA, Antwerp, to a retrospective of the late artist Chiara Fumai at Centro Pecci, Prato, these are the institutional shows not to miss in the Schengen area