 Witkins work is also included in the permanent collections of the Smithsonian American Art Museum, Washington DC, the Centre for Modern Art, Calouste Gulbenkian Foundation, Lisbon, Portugal; Fine Arts Museum, University of Sydney, Australia; the Hirshhorn Museum and Sculpture Garden, Washington, DC; Laumier Sculpture Park, St. Louis, MO; Tate Gallery, London; and The Israel Museum, Jerusalem.His work is also displayed on his family’s website, www.isaacwitkin.com.Isaac Witkin died 23 April 2006 of a heart attack at his home in Pemberton, New Jersey.