Royal Mint was historically part of a series of mints that became centralised to produce coins for the Kingdom of England, all of Great Britain and eventually most of the British Empire. The original London mint from which the Royal Mint is the successor, was established in 886 AD and operated within the Tower of London for approximately 800 years before moving to what is now called Royal Mint Court where it remained until the 1960s. As Britain followed the rest of the world in decimalising its currency, the Mint moved from London to a new plant in Llantrisant, Wales where it
Royal Mint mint were ceremoniously delivered to the Constable of the Tower. Facing the front of the site stood the Johnson Smirke Building whose namesake comes from its designer James Johnson and builder Robert Smirke. This building was flanked on both sides by gatehouses behind which another building housed the mint's new machinery. A number of other smaller buildings were also erected which housed mint officers and staff members. The entire site was protected by a boundary wall which was patrolled by the Royal Mint's military guard. By 1856, the mint was beginning to prove inefficient, suffering from irregularities in minted coins'