It is one of the earliest Christian works in Cappadocia and is of great importance for the Orthodox world. The church was built by Emperor Theodosius on behalf of the Nenezili religious scholar, St. Gregorius Theologos, in 385 in a closed cross plan. Later, the bell tower of the church, which underwent various changes, was turned into a minaret and converted into a mosque. The iconostasis, made of wood and painted with madder, located in the apse of the Church Mosque, was moved from its place and arranged as a mihrab after the church was converted into a mosque. In addition to this work, which is one of the most beautiful examples of wood carving, the Russian Tsar II. The wooden anbon sent by Nicholas complements the iconostasis.
To the north of the garden is the guest house of the temple. Next to the Church Mosque, there is the underground water, spring, which is descended by a staircase of thirty-five steps.

Kaynak:

https://aksaray.ktb.gov.tr/TR-63659/kiliseler.html