of this type. The site is the first of its kind to be investigated by archeologists. On May 7, 2003, vandals attacked the monument cutting off the sold granite/marble head of the male figure and the arm of the female figure. The missing parts were never recovered but replaced in 2005 with funding from private donations. Centennial On April 19, 2013, Colorado Governor John Hickenlooper signed an executive order to create the Ludlow Centennial Commemoration Commission. The group worked to develop programming in the state, such as lectures and exhibits, to commemorate the Ludlow workers' struggle and raise awareness of the massacre. It worked with Colorado museums, historical societies, churches and art galleries, and supplied programming in 2014. Historical investigation Archaeology In 1996, the 1913–1914 Colorado Coalfield War Project began under the leadership of Randall H. McGuire of Binghamton University, Dean Saitta of University of Denver, and Philip Duke of Fort Lewis College, who later formed the Ludlow Collective. Their team conducted excavations of the territory of the former tent colony and surrounding areas. Gallery See also Coal Wars Colorado Labor Wars Columbine Mine Massacre of 1927 Labor history of the United States Labor movement Labor unions Labor unions in the United States List of battles fought in Colorado List of incidents of civil unrest in the United States List of massacres in the United States List of worker deaths in United States labor disputes Ludlow Massacre (song) Mary Thomas O'Neal Union violence References Further reading Adams, G., The Age of Industrial Violence, 1910–1915: The Activities and Findings of the U.S. Commission on Industrial Relations. Columbia University Press, New York, 1966. Alhadef, Tammy. "Last Survivor of Ludlow Massacre Dies at 94." Pueblo Chieftain. July 6, 2007. Beshoar, Barron B., Out of the Depths: The Story of John R. Lawson, a Labor Leader. Colorado Historical Commission and Denver Trades and Labor Assembly, Denver, 1957. Boughton, Major Edward J., Capt. William C. Danks, and Capt. Philip S. Van Cise, Ludlow: Being the Report of the Special Board of Officers Appointed by the Governor of Colorado to Investigate and Determine the Facts with Reference to the Armed Conflict Between the Colorado National Guard and Certain Persons Engaged in the Coal Mining Strike at Ludlow, Colo., April 20, 1914. Chernow, R., Titan: The Life of John D. Rockefeller Sr., Random House, New York, 1998. Clyne, R., Coal People: Life in Southern Colorado's Company Towns,