"Mass Ave.") and Cambridgeport on the south side between Massachusetts Avenue and the Charles River. Both of these neighborhoods were once known as The Port or Old Port region of Cambridge. The area to the west and northwest of Central Square is known as Mid-Cambridge. Central Square is accessible from Central station on the MBTA Red Line, as well as Buses 1, 64, 70, 83, and 91. The intersection of Massachusetts Avenue and Brookline in front of The Middle East in Central Square is named in honor of the late indie rock musician Mark Sandman, who often played there. Central Square serves as the commercial center for the surrounding neighborhoods of Cambridgeport, Riverside, Mid Cambridge, Area 4 and MIT. Local government services Central Square is the seat of government in Cambridge. Cambridge City Hall, and the main branch of the Cambridge Post Office are located in this area. The Cambridge Police Department headquarters was formerly at 5 Western Avenue in the Central Square area; however, between November 2008 and March 2009 it completed a relocation to a new facility at 125 Sixth Street, near Kendall Square. Notable residents Ben Affleck, actor Casey Affleck, actor Matt Damon, actor Ken Brown, filmmaker Lisa Crafts, animator Patrick Ewing, athlete Vernon Grant, cartoonist John Forbes Nash, mathematician Margaret Hamilton, scientist and engineer Notable businesses Central Square Theater The Middle East (nightclub) Toscanini's Fiction about Central Square Central Square (1998), by George Packer. Graywolf Press See also Carl Barron Plaza National Register of Historic Places listings in Cambridge, Massachusetts References External links CentralSquare.com Photo comparison of Central Square in 1998 and 2002 www.c2culture.com www.centralsquarecambridge.com]/ http://centralsquarecambridge.com/ Squares in Cambridge, Massachusetts Neighborhoods in Cambridge, Massachusetts Historic districts in Middlesex County, Massachusetts Entertainment districts in the United States National Register of Historic Places in Cambridge, Massachusetts Historic districts on the National Register of Historic Places in Massachusetts