The Mysterious Cities of Gold(太陽の子エステバンTaiyō no Ko Esuteban, Les Mystérieuses Cités d'or)also called Esteban, a Boy from the Sun, abbreviated MCoG, is a Japanese-French animated series co-produced by DiC Entertainment and Studio Pierrot. The series premiered in Japan on NHK on May 1, 1982 and ran for 39 episodes until its conclusion on September 5, 1983. Set in 1532, the series follows the adventures of a young Spanish boy named Esteban who joins a voyage to the New World in search of the lost Cities of Gold and his father.