The fortress named Keykavuz Kale is placed in the best vantage point of the site. It was built over the earlier fortifications dateing to the late Achemenid period. Fotress has been used during the Hellenistic and Roman periods. The Byzantine fortress dates to ca 7th century.
Sources:
- Geoffrey D. Summers, Keykavus Kale and Associated Remains on the Kerkenes Dağ in Cappadocia, Central Turkey in: Anatolia Antiqua (IX), p.39-60 - http://www.persee.fr/doc/anata_1018-1946_2001_num_9_1_955