During Byzantine trimes a cave-church was carved into the walls of the uppercave and a monastery constructed outside the cave mouth.
Sources:
- William R. Farrand and Jill P. McMahon, History of the Sedimentary Infilling of Yarimburgaz Cave, Turkey, Geoarchaeology 1997, Volume 12,(6) pp. 537-565. - https://deepblue.lib.umich.edu/bitstream/handle/2027.42/34951/3_ftp.pdf?sequence=1