The Melbourne Mint, in Melbourne, Australia, was a branch of the British Royal Mint. It minted gold sovereigns until 1931 and half-sovereigns until 1915. In 1916 it commenced minting Commonwealth silver threepences, sixpences, shillings and florins. From 1923 it minted all pre-decimal denominations. It minted rarities such as the 1921/22 overdate threepence, 1923 half-penny and 1930 penny, as well as Australia's four commemorative florins in 1927 (Canberra), 1934/35 (Melbourne Centenary), 1951 (Federation Jubilee) and 1954 (Royal Visit). It assisted the Royal Australian Mint in Canberra in producing one cent coins from 1966 to 1968 and two cent coins in 1966. From 1969 all coin production moved to the Royal Australian Mint in Canberra. It is now the home of the Royal Historical Society of Victoria, and has been leased to the private sector since 2001.The former Royal Mint is located on the corner of William and La Trobe Streets (280-318 William Street and 387-429 La Trobe Street) and is of architectural significance as one of the most impressive 19th century government buildings in Victoria, and one of few Australian buildings in the true Renaissance revival style, and a virtual copy of the Palazzo Vidoni-Caffarelli, attributed to Raphael, in Rome (1515).The mint was built between 1869 and 1872 to the designs of architect J.J Clark whose other notable works included the Old Treasury Building, Melbourne. It was opened 12 June 1872 Operating as usual