Frans Hals (until Jun 9) is the first retrospective in 30 years on this most productive, innovative, entertaining and a little rough around the edges of artists, regarded as one of the most distinctive of the 17th century for his brisk, impressionistic painting style. Following celebrated solo shows on Vermeer and Rembrandt at the Rijksmuseum, this exhibition features some 50 of the Dutch master’s greatest paintings, many on loan from top international collections.