Church of the Holy Mother of God, Asen's Fortress

The Church of the Holy Mother of God (Bulgarian: църква "Света Богородица", tsarkva "Sveta Bogoroditsa") is the popular name of a medieval Eastern Orthodox church located in Asen's Fortress. It lies near Asenovgrad in the Rhodope Mountains of Plovdiv Province, south central Bulgaria. Constructed most likely in the 12th century, it features two stories, of which the upper story is the church proper and the lower story is of unclear function. The rectangular tower over the church's narthex is regarded as the earliest preserved of its kind in the Balkans. Fragments of frescoes are visible on the walls of the church's upper story.