Not the first generation of scientists engaged in archaeological study of Eski-Kermen. However, not all its secrets yet managed to solve. Particularly difficult to trace the history of cave churches. Obviously, it's time to attract a special kind of experts – priests. However, examples of such cooperation is not enough. The authors of this paper attempted to demonstrate the scientific community, as can be fruitful, such contacts. The present article is devoted to clarify the causes and circumstances of the emergence trikonhial cave temples in the Crimea.