Pieza de tiempo 1989 Richard Artschwager Pieza de tiempo Oil on wood, Formica and aluminum Two parts, installed 25 1/2 x 23 1/2 x 5 1/4 in. (64.8 x 59.7 x 13.3 cm) Gift of the Ruttenberg Family in honor of the 90th birthday of David C. Ruttenberg