Even animals are entitled to 15 minutes of fame. Art collector Gabrielle Keiller’s dachshund gets his in Andy Warhol’s “Portrait of Maurice.” Warhol (1923 – 1987) founded the Pop Art movement, while defining a decade and its culture. He honored American mass-produced products he loved by producing silk-screened multiples of Campbell’s Soup can, Coca Cola bottles and dollar bills, revealing their inherent beauty.