“Le monument au général alvéar”—Antoine Bourdelle’s life-size statue of the Argentinian independence movement leader on his steed—stands majestically in the center of the Musée Bourdelle’s Salle des Plâtres (Plaster Room). The Général has always been guarded by marble, allegorical figures of Eloquence and Force, but this time, on a white headless mannequin, tucked between them, hung a white, asymmetrical dress with multiple folds and pleats protruding from the waist and bodice. There was a simple marking at the base: “Collection 1945 Jersey Dress.” In the nearby rotunda, above a circular staircase where the “Centaure mourant” lays dead, were hung two more white jersey dresses encased in frames. It is the work of Madame Grès, née Germaine Krebs (1903-1993), and it...