The settlement, which is mentioned as Andavilis, Addaualis, Ambavalis in historical sources, served as a station on the road from Istanbul to the Cilicia Pylaisi in Late Antiquity. The church belonging to the Byzantine period is briefly described in W.J.HAMILTON's travel book published in 1842. The traveler states that the church in Old Andaval was a church dedicated to Helena, the mother of Constantine. 8 km from Nigde province. It is located in the northeast of Aktaş Village, on the coast of the Niğde - Kayseri railway, and is dated to the Early Byzantine period. It was built in the basilica plan scheme. The building has a rectangular plan, close to a square, in the east-west direction. There is an apse protruding outward in the east, round in the interior, and polygonal in the exterior. The naos with three naves is 12 m. inside. long, 12.20m wide. On the west wall of the naos, two doors open outwards, one to the middle nave and the other to the north nave. There are three window openings on the north and south walls of the naos, which have been destroyed today. The northern and southern walls of the church were destroyed, while the eastern and western walls were largely destroyed. Accordingly, the cover system is also not standing. The church was built of tuff stones. The church was built in the 9th century AD. The frescoes (north wall of the nave) were relatively intact. Renovation works of the Andaval Church, which belongs to approximately 1500 years ago, are carried out under the presidency of the Niğde Museum Directorate.

Source:

https://nigde.ktb.gov.tr/TR-154659/kilise-ve-sapeller.html