The "fiorino d'oro" of the Republic of Florence was the first European gold coin struck in sufficient quantities to play a significant commercial role in Europe. It was first struck in 1252. It had 3.5 grams of nominally pure gold (0.1125 troy ounce).
The design of the original Florentine florins was the distinctive fleur-de-lis "flore" badge of the city on one side and on the other a standing, facing figure, of St. John the Baptist wearing a hair shirt. This "flore" coin was called a "florin" or a "golden florin".
As many Florentine banks were international super companies with branches across Europe, the florin quickly became the dominant trade coin of Western Europe for large scale transactions, replacing silver bars in multiples of the mark (a weight unit equal to eight troy ounces), or a pound sterling silver.
In the fourteenth century, a hundred and fifty European states and local coin issuing authorities made their own copies of the florin. However, on other countries' florins, first the inscriptions were changed (from "Florentia" around the fleur, and the name of the saint on the other side), then local heraldic devices were substituted for the fleur de lis.