The Catalan; Valencian: croat was a silver coin of Catalonia introduced by the king Peter III in 1285 and minted at Barcelona, Perpignan and Tortosa. The term "croat" derives from the Latin grossus denarius, great coin, a common term for silver coins of higher value than pennies. Peter III was inspired by the gros introduced by Louis IX of France.
The Catalan; Valencian: croat was originally worth twelve terns of 25% silver billon. In 1340 the gold florín was introduced at a value of eleven Catalan; Valencian: croats. The purity of the florín was fixed at eighteen carats (75% gold) in 1365. As the popularity of the florín and the Catalan; Valencian: croat grew, the Aragonese empire settled into bimetallism. The Catalan Catalan; Valencian: croat was equivalent in value to the Aragonese ral (which went by many names: grosso, real, alfonsino, anfusinus). It was the most stable of all the Aragonese coinage and widely used in the Mediterranean trade.