The term French Coin, Ancient can be summarized by four crossword solutions: SOU, ECU, NAPOLEON, and DENIER. The SOU was a gold coin used in France from the Middle Ages until the 19th century. The ECU was a silver coin used in France from the 16th to the 19th centuries. The NAPOLEON was a gold coin issued by NAPOLEON I in 1803. Finally, the DENIER was a small silver coin used in France from the 8th century until the 19th century.