The Barbican Estate, or Barbican, is a residential complex of around 2,000 flats, maisonettes, and houses in central London, England, within the City of London. It is in an area once devastated by World War II bombings and densely populated by financial institutions, 1.4 miles (2.2 km) north east of Charing Cross. Originally built as rental housing for middle and upper-middle-class professionals, it remains an upmarket residential estate. It contains, or is adjacent to, the Barbican Arts Centre, the Museum of London, the Guildhall School of Music and Drama, the Barbican public library, the City of London School for Girls and a YMCA (now closed), forming the Barbican Complex.
The Barbican Complex is a prominent example of British brutalist architecture and is Grade II listed as a whole, with the exception of the former Milton Court, which once contained a fire station, medical facilities, and some flats, but was demolished to allow the construction of a new apartment tower—named The Heron—which also provides additional facilities for the Guildhall School of Music and Drama.
The main fort of Roman London was built between 90 and 120 AD south-east of where the Museum of London now stands at the corner of London Wall and Aldersgate Street. Around 200 AD walls were built around the city that incorporated the old fort, which became a grand entrance known as Cripplegate. The word barbican comes from the Low Latin word Barbecana which referred to a fortified outpost or gateway, such as an outer defence of a city or castle or any tower situated over a gate or bridge which was used for defence purposes. In this case there seems to have been a Roman specula or watchtower in front of the fort from numbers 33–35 onwards on the north side of the street formerly called Barbican (now the west end of Beech St), which was later incorporated into the fortifications north of the wall. The Normans called it the Basse-cour or Base Court, synonymous with the modern word "bailey" and still applied to the outer courtyard of Hampton Court Palace.