Claes Oldenburg was a Swedish-born American artist born in 1929 who is considered a prominent figure in Pop Art. Some of his most famous large-scale sculptures include Lipstick (Ascending) on Caterpillar Tracks, Clothespin, and Spoonbridge and Cherry. Oldenburg sought to make ordinary objects extraordinary in scale through his use of everyday items such as a clothespin or sandwich. Many of his pieces were collaborations with his wife Coosje van Bruggen before her death in 2009.