Is it ensure, insure, or assure?
gold coin circulated in France before the Revolution. The franc (q.v.) and livre were silver coins that had shrunk in value to such an extent that by 1740 coins of a larger denomination were needed. The French kings therefore had gold coins struck and called after their name Louis, or louis d'or ("gold Louis"). After the Revolution, Napoleon continued the practice but called the coins "napoleons." They had a value of 20 francs.