Many new books have been published on this topic. In 2005 the New-York Historical Society mounted its first exhibit ever on slavery in New York; the planned six-month run was extended into 2007 because of its popularity. When the visitor center at the burial ground opened in 2010, Edward Rothstein wrote, A revision in popular understanding has taken place about slavery's history in New York City, evident in several recent books and an impressive series of shows at the New-York Historical Society. In the 18th century slaves may have constituted a quarter of the New York workforce, making this city one of the colonies' largest slave-holding urban centers. See also List of buildings and structures on Broadway in Manhattan List of National Historic Landmarks in New York City List of national monuments of the United States History of slavery in New York History of slavery in New Jersey Flatbush African Burial Ground Landmark sites in the district 49 Chambers New York City Hall Surrogate's Courthouse Tweed Courthouse References Further reading Blakey, M.L. 1997. The New York African Burial Ground Project: an examination of enslaved lives, a construction of ancestral ties, Briefing prepared for the Sub-commission on Prevention of Discrimination and Protection of Minorities Commission on Human Rights, United Nations. Delivered at the Palais des Nations, Geneva Switzerland, August 19. Blakely, M.L. 1996. "Howard University research reaches a new plateau," Newsletter of the African Burial Ground and Five Points Archaeological Project, 1 (10):3–7. Epperson, T.W. 1997. "The politics of "race" and cultural identity at the African Burial Ground excavations, New York City," World Archaeological Bulletin, 7:108–117. Foote, T.W., M. Carey, J. Giesenberg-Haag, J. Grey, K. McKoy, and C. Todd. 1993. "Report on Site-Specific History of Block 154," Written for the African Burial Ground Research Project. New York. Gathercole, P. and D. Lowenthal, eds. 1994. The Politics of the Past, New York: Routledge. Gero, J. and M.W. Conkey. 1993a. Engendering Archaeology: Women and Prehistory, Basil Blackwell. Gero, J. and M.W. Conkey. 1993b. "Tensions, pluralities and engendering archaeology," In Gero, J. and M.W. Coney, ed. Engendering Archaeology: Women and Prehistory, pp. 3–31. Basil Blackwell. Howson, J.E. 1992. "The Foley Square Project: An 18th century cemetery in New York City," African American Archaeology, Newsletter No. 6, Spring. pp. 3–4. Jaffe, S.H. 1995. " 'This Infernal Traffic': New York Port and the illegal slave trade." Seaport: New York's History Magazine 29 (3):36–37. Jamieson, R.W. 1995.