The College of Arms, one of the few remaining official heraldic authorities in Europe, was incorporated by royal charter in the City of London.

The College of Arms is a royal corporation consisting of professional officers of arms, with jurisdiction over England, Wales, Northern Ireland, and some Commonwealth realms. The heralds are appointed by the British Sovereign and are delegated authority to act on behalf of the Crown in all matters of heraldry, the granting of new coats of arms, genealogical research, and the recording of pedigrees. The College is also the official body responsible for matters relating to the flying of flags on land, and it maintains the official registers of flags and other national symbols. Though a part of the Royal Household of the United Kingdom, the College is self-financed, unsupported by any public funds.

A heraldic authority is defined as an office or institution which has been established by a reigning monarch or a government to deal with heraldry in the country concerned. It does not include private societies or enterprises which design and/or register coats of arms. Over the centuries, many countries have established heraldic authorities, and several still flourish today.

A royal charter is a formal grant issued by a monarch under royal prerogative as letters patent. Historically, they have been used to promulgate public laws, the most famous example being the English Magna Carta of 1215, but since the 14th century have only been used in place of private acts to grant a right or power to an individual or a body corporate. They were, and are still, used to establish significant organisations such as boroughs, universities and learned societies, and were historically used to establish companies.

The City of London, is a city, ceremonial county and local government district in England. Established by the Romans around 47 AD as Londinium, it forms the historic centre of the wider London metropolis. Surrounded by the modern ceremonial county of Greater London, from which it remains separate, the City is a unique local authority area governed by the City of London Corporation, which is led by the Lord Mayor of London; although it forms part of the region governed by the Greater London Authority.