Daniel-Henry Kahnweiler is the Picasso of art dealers. In 1907, he opened a quaint gallery in Paris, on 28 rue Vignon, and presciently focused on the Cubists, promoting work by Georges Braque, Picasso, André Derain, and Maurice de Vlaminck. Collectors followed his lead and his influence grew. When war broke out in 1914, Kahnweiler fled to Switzerland and his holdings were broken into and stolen. He returned to Paris in 1920 and started anew at 29 rue d’Astorg. Kahnweiler was Jewish, and when the Nazis took Paris during W.W. II he fled, hiding elsewhere in France and surviving. After the war, his gallery rose to prominence once again but under the name of his stepdaughter. Kahnweiler was 94 when he died in 1979. This exhibition celebrates a man who shaped the course of 20th-century art. —Elena Clavarino