It is a three-aisled basilica with its external polygonal apse flanked, in the Syrian style, by a chamber to either side of it.
Sources:
- Ferda Barut Kemirtlek, R. Eser Kortanoğlu, Antik Kastabala Kenti Kuzey Kilise Üzerine Gözlemler: Uzam, Mekan ve Anlamsal Üretim Döngüsü Observations on Ancient Castabala City North Church: Space, Anadolu Aristirmalari 23, 2020, pp. 261–288