This collection now contains 128 masks, mask molds, wigs, and plaster mask reproductions. The oldest mask in the collection is an 18th century Javanese dance mask. A gift from Prof. and Mrs. Samuel Eilenberg in 1963, the mask is also the most recent acquisition. The newest masks in the collection were made in 1955 for an American production of Lysistrata. The collection includes items from Japan, Italy, Java, Sri Lanka, Thailand, Papua New Guinea, Mexico, Ivory Coast, Sierra Leone, India, and the United States. It is particularly abundant in Japanese, Mexican, and American masks.