Karabaş Kilisesi ('Church with the Black Heads') in the northern branch of the Soğanlı Valley has a nave with a barrel vault. According to an inscription of the Byzantine general Michael Skepides above the west door, the latest layer of frescoes were produced in the 13th century. They show scenes from the Life of Jesus, on a black background. A collection of nearby buildings suggest that this church was the centre of a monastery.
Source: Soğanlı Valley - Wikipedia