Who was Berthe Weill, art dealer of the Parisian Avant-garde A view of the Georges Kars Exhibition at Galerie B. Weill, photographed by Marc Vaux in 1928. 07/17/25 5:25pm “Berthe Weill, Art Dealer of the Parisian Avant-garde” is at the Montreal Museum of Fine Arts through September 7, 2025.