The term 'Former French Coin' refers to three different coins that were used in France in the past. The first is the Sou, a small copper coin that was used from the Middle Ages until the 19th century. The second is the Ecu, a gold coin that was used from the 14th to the 18th centuries. Finally, the Franc was a silver coin that was used from the 13th to the 20th centuries. All three coins were replaced by the Euro in 2002.