Government Center station is an MBTA subway station in Boston, Massachusetts. It is located at the intersection of Tremont, Court and Cambridge Streets in the Government Center area. It is a transfer point between the light rail Green Line and the rapid transit Blue Line. With the Green Line platform having opened in 1898, the station is the third-oldest operating subway station (and the second-oldest of the quartet of "hub stations") in the MBTA system; only Park Street and Boylston are older. The station previously served Scollay Square before its demolition for the creation of Boston City Hall Plaza. The station was closed on March 22, 2014 for a major renovation, which included retrofitting the station for accessibility and building a new glass headhouse on City Hall Plaza. The new fully accessible station was reopened on March 21, 2016. History Scollay Square As the first horsecar lines were built in the late 1850s, the Scollay Building in Scollay Square became the transfer point between the various lines. The Metropolitan Railroad, the largest of the horsecar systems, used the Tremont House hotel a block to the south of Scollay Square as a terminus for many routes. The northern section of the Tremont Street Subway opened on September 3, 1898, with a station at Scollay Square. The station had an unusual platform design. The three-sided main platform served northbound and southbound through tracks plus the Brattle Loop track, one of two turnback points (along with Adams Square) for streetcars entering the subway from the north; a side platform also served the loop Boston Elevated Railway (BERy) streetcars from Everett, Medford, and Malden (which formerly ran to Scollay Square on the surface) used Brattle Loop, as did cars from Lynn and Boston Railroad and its successors. The last of those, the Eastern Massachusetts Street Railway, used the loop until 1935. Scollay Square and Adams Square had similar baroque headhouses with four-sided clock towers. Unlike Adams Square, the Scollay Square headhouse had its entrance at one end of the structure. A small exit structure was located to the north, while the Brattle Loop used a separate entrance built into a building at Court Street and Brattle Street. The headhouses of the Tremont were sharply criticized as "pretentiously monumental", with the Scollay Square headhouse compared to "an enlarged soda fountain". Later stations on the East Boston Tunnel and Washington Street Tunnel incorporated this criticism into