Chancery Lane is a one-way street that forms part of the western boundary of the City of London. The east side of the street is entirely within the City, whilst the west side is in the City of Westminster south of Carey Street and the London Borough of Camden north of that street. The route originated as a 'new lane' created by the Knights Templar from their original 'old Temple' on the site of the present Southampton Buildings on Holborn, in order to access to their newly acquired property to the south of Fleet Street sometime before 1161.

The City of London, widely referred to simply as the City, is a city, ceremonial county and local government district that contains the ancient centre, and constitutes, along with Canary Wharf, the primary central business district (CBD) of London and one of the leading financial centres of the world. It constituted most of London from its settlement by the Romans in the 1st century AD to the Middle Ages, but the modern area referred to as London has since grown far beyond the City of London boundary. The City is now only a small part of the metropolis of Greater London, though it remains a notable part of central London. The City of London is not one of the London boroughs, a status reserved for the other 32 districts. It is also a separate ceremonial county, being an enclave surrounded by Greater London, and is the smallest ceremonial county in England.