It’s extraordinary that Caillebotte’s bequest helped to shape the canon of impressionism because he purposefully bought his friends’ least popular paintings. Caillebotte made it a principle to buy “especially those works of his friends which seemed particularly unsaleable,” the art historian John Rewald wrote. For example, Caillebotte served as a buyer of last resort when he purchased Renoir’s Bal du Moulin de la Galette.