The Louis d'or is any number of French coins first introduced by Louis XIII in 1640. The name derives from the depiction of the portrait of King Louis on one side of the coin; the French royal coat of arms is on the reverse. The coin was replaced by the French franc at the time of the revolution and later the similarly valued Napoleon.
Louis XV (15 February 1710 – 10 May 1774), known as Louis the Beloved (Louis le bien aimé), was a monarch of the House of Bourbon who ruled as King of France from 1 September 1715 until his death. He succeeded his greatgrandfather Louis XIV at the age of five. Until he reached maturity in 1723, his kingdom was ruled by Philippe II, Duke of Orléans, as Regent of France; the duke was his great-uncle, as well as first cousin twice removed patrilineally. Cardinal Fleury was his chief minister from 1726 until the Cardinal's death in 1743, at which time the young king took sole control of the kingdom.