The U.S. Department of Labor Library is one of the oldest Cabinet-level libraries in existence. Large portions of the library holdings are unique documentation of the social and economic history of the United States, including Folio Collection of labor union documents going back to the 1860s. On March 28, 2000, Labor Secretary Alexis M. Herman dedicated the library to former Secretary W. Willard Wirtz and his wife Jane. Visit the Wirtz Labor Library at http://www.dol.gov/oasam/wirtzlaborlibrary/welcome.htm.