With the support of Harold Washington and Chicago's wealthy Pritzker family, ground was broken at the chosen site at Congress Parkway and State Street, covering an entire block. Upon the building's completion in 1991, the new mayor, Richard M. Daley, named the building in honor of the now-deceased former mayor Harold Washington, an advocate of reading and education among Chicagoans as well as an advocate of the library's construction. Before 1872, Chicago had mainly private libraries.