Koruköy Kalesi - Koruköy Fortress was discovered during the Survey of the Turkish Fortresses conducted by I. H. Kurtulus in the Thrace Region in 1995.
Sources:
- Koruköy Kalesi-The Archaeological Settlements of Turkey - TAY Project
- Kırklareli Kültür Varlıkları Envanteri. Kuzulu Koyva Kaya Oyma Kilisesi, Kirklareli http://www.kirklarelienvanteri.gov.tr/sitler.php?id=372. Accessed October 30, 2018