The first attested Christian organization the territory of the later Principality of Moldavia was the Catholic Diocese of Cumania in the southern part of the region, dating from 1227, at a time when the Kingdom of Hungary attempted to extend its control in the region. However, as early as 1234, Orthodox Vlachs are mentioned in the diocese, having their own "pseudobishops" (or rural bishops). The diocese was soon destroyed by the Mongol invasion of 1241, and only beginning with the late 13th century did Catholic missionaries become active again in southern Moldavia.