For works of art by Modern French Masters, look to Galerie Rienzo on Madison Avenue. Established in 1980, Robert Rienzo is the United States expert on Bernard Buffet. Jean Jansem, is also an authority on Cassigneul, Dufy, Valtat, Camoin, and other artists of the School of Paris. With a focus on excellent service, extensive research, and the highest quality paintings, Galerie Rienzo is the source for French 20th-century art, or for guidance on starting or building an entire collection. In a market where a mistake can be an expensive one, the role of the dealer-as-advisor, and the 'eye' has become critical.