A Turkish tribe who devastated parts of Rumania and Transylvania in the Middle Ages. In 1089 a victory was gained over them by Saint Ladislaus. The Cumans in the 13th century were converted through the labors of the Order of Preachers and a "Diocese of the Cumans" was erected by the Archbishop of Gran which included Rumania, Bessarabia, and a portion of Transylvania. This district was ravaged by the Tatars in 1241. The title of the see was retained until 1523.