St. Nicholas' Monastery of Medea was built during the time of Emperor Justinian I (r. 527-565). The rock-cut monastery is located along Papuç Stream less than a kilometer west of Kıyıköy (medieval Medea) on the Black Sea coast. The entire monastery complex includes a rock-hewn three-aisled basilica. From the southern end of nartex stairs still preserved led to hagiasma.
See:-
- http://arci-ngo.org/bgtrmat/1_1_Study_Province_Kirklareli_EN.pdf, p. 19
- Monastery of St. Nicholas near Medea, The Byzantine Legacy-https://www.thebyzantinelegacy.com/nikolaos-medea