Noyon (nwäyôNˈ) [key], town (1990 pop. 14,628), Oise dept., N France. It has foundries, metalworks, and machine, clothing, and food-processing industries. In 768 at Noyon, Charlemagne was crowned king of the Franks. France and Spain signed a treaty there in 1516 (see Italian Wars). The town was devastated in both World Wars, but the Cathedral of Notre Dame (12th–13th cent.) has survived. The house where John Calvin was born is now a museum.