The Foundation owns Taliesin West (designed 1937-59) in Arizona and Taliesin (designed 1911-59) in Wisconsin. Both properties served as Wright’s personal homes, studios, and architectural laboratories and are integral to understanding his genius. The Foundation works in partnership with the Wisconsin-based non-profit organization, Taliesin Preservation Inc., to conduct programs related to preservation and public access at Taliesin. Both Taliesin and Taliesin West are recognized as National Historic Landmarks, the most elite designation on a national level available for cultural properties in the U.S. Both properties were also nominated for U.S. World Heritage Tentative List status.