The franc was a currency

Currency

In economics, currency refers to a generally accepted medium of exchange. These are usually the coins and banknotes of a particular government, which comprise the physical aspects of a nation's money supply...

 of France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. Along with the Spanish peseta

Spanish peseta

The peseta was the currency of Spain between 1869 and 2002. Along with the French franc, it was also a de facto currency used in Andorra .- Etymology :...

, it was also a de facto currency used in Andorra

Andorra

Andorra , officially the Principality of Andorra , also called the Principality of the Valleys of Andorra, , is a small landlocked country in southwestern Europe, located in the eastern Pyrenees mountains and bordered by Spain and France. It is the sixth smallest nation in Europe having an area of...

 (which had no national currency with legal tender). Between 1360 and 1641, it was the name of coins worth 1 livre tournois

Livre tournois

The livre tournois |pound]]) was:#one of numerous currencies used in France in the Middle Ages; and#a unit of account used in France in the Middle Ages and the early modern period.-Circulating currency:...

 and it remained in common parlance as a term for this amount of money. It was re-introduced (in decimal form

French livre

The livre was the currency of France until 1795. Several different livres existed, some concurrently. The livre was the name of both units of account and coins.-Etymology:...

) in 1795 and remained the national currency until the introduction of the euro

Euro

The euro is the official currency of the eurozone: 17 of the 27 member states of the European Union. It is also the currency used by the Institutions of the European Union. The eurozone consists of Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg,...

 in 1999 (for accounting purposes) and 2002 (coins and banknotes).