federal court, and President Biden restored the original areas in 2021. Although some presidents have chosen to ignore the tradition of preservation of notable environmental or historic areas, no president to date has entirely undone a predecessor's monument. Several Supreme Court cases have upheld the president's ability to proclaim large areas under the Act. See also List of National Monuments of the United States National Park Service References External links National Monument Facts and Figures – National Park Service Chronological list of uses of the Antiquities Act and related actions from NPS The Story of the Antiquities Act, by Ronald F. Lee The Monumental Legacy of the Antiquities Act of 1906 – Mark Squillace, University of Colorado Law School Archeology.org Richard West Sellars, "A Very Large Array: Early Federal Historic Preservation--The Antiquities Act, Mesa Verde, and the National Park Service Act"(background and legislative history) published by the University of New Mexico School of Law, 2007 The Antiquities Act: A Century of American Archaeology, Historic Preservation, and Nature Conservation, ed. by David Harmon, Frank P. McManamon, and Dwight T. Pitcaithley The Highs and Lows of the Antiquities Act National Monuments and the Antiquities Act – Congressional Research Service The Proclamation of National Monuments Under the Antiquities Act, 1906-1970 1906 in law 1906 in the environment 1906 in the United States Progressive Era in the United States United States federal environmental legislation United States federal public land legislation National Park Service