The Thomas Gilcrease Institute of American History and Art, commonly known as Gilcrease Museum, located in Tulsa, Okla., is one of the countryâ€™s best facilities for the preservation and study of American art and history. Gilcrease houses the world's largest and most comprehensive collection of art and artifacts of the American West, including an unparalleled collection of Native American art and material. The adjacent Helmerich Center for American Research houses the vast archival collection, including rare books, documents, maps and unpublished material related to the history of the North American continent. Combined, the collection encompasses thousands of years of history, including the discovery, expansion and settlement of North America, with special emphasis on the Western Frontier and American Indian material. The museum, owned by the City of Tulsa and managed by The University of Tulsa, is the city's most valuable asset with a collection in excess of 350,000 items, including documents from the earliest days of democracy, artifacts from indigenous cultures and anchored by masterworks of American artists, such as Thomas Moran, Joseph Henry Sharp and Charles M. Russell. Poised for a major expansion provided by public tax extension allocating $65,000,000, Gilcrease is developing a new interpretive strategy that will engage a broader audience, share the diverse stories of Americans and elevate the museum to a position of national prominence.