Preview of gallery guide accompanying the Weitzenhoffer Collection on permanent display. In 2000, the University of Oklahoma received the single most important collection of French Impressionism ever given to an American public university. The collection includes 22 paintings and 11 works on paper by such artists as Degas, Gauguin, Monet, Pissarro, Renoir, Toulouse-Lautrec, Van Gogh, Vuillard, among others.