Boston City Hall

Boston City Hall is the seat of city government of Boston, Massachusetts, United States. Surrounded by City Hall Plaza in the Government Center section of Downtown Boston, it includes the offices of the Mayor and the City Council. The building was designed by the architecture firms Kallmann McKinnell & Knowles (KMK) and Campbell, Aldrich & Nulty, with LeMessurier Consultants as engineers. A major brutalist-style building, City Hall is a designated Boston Landmark.

City Hall was proposed in 1956 as part of the Government Center development, following decades of efforts to replace Old City Hall. Acquiring the land and sufficient funding took half a decade, and KMK won a two-phase architectural design competition in 1962. Groundbreaking took place on September 18, 1963; the first occupants moved in during late 1967, and the building was decorated on February 11, 1969. In addition to governmental business, City Hall was used for a variety of events and exhibits. Over time, the building suffered from deferred maintenance, and Mayor Thomas Menino twice proposed replacing it in the 1990s and 2000s. City Hall underwent renovations starting in the 2010s.

The nine-story massing is split into three tiers, corresponding to the interior subdivisions. There are public areas on the first through fourth stories, elected officials' spaces on the fifth story, and nonpublic agencies at the sixth through ninth stories. The facade is made of brick below and concrete above, with entrances on the bottom three levels. There are protruding "hoods" around the fifth-floor windows, while the upper stories protrude outward, surrounding a central fourth-story courtyard. Inside are a concourse on the second story; a plaza lobby occupying the third and fourth stories; a council chamber, mayor's suite, and councilors' rooms on the fifth story; and offices elsewhere.

The building has received extensive commentary on its symbolism, usability, and architecture. Architects initially had mixed views of the design but praised the building after its completion. City Hall received the American Institute of Architects' 1969 Honor Award and was ranked in a 1976 poll of the United States' greatest buildings. Conversely, the public widely condemned it, and City Hall has appeared in several lists of the world's ugliest buildings. The design has influenced Brutalist architecture in Boston, along with similar buildings across the U.S. and worldwide.