Amasra Fatih Mosque (former St. Sophia Church)

The Fatih Mosque in Amasra, Bartın province, is a converted Byzantine church — locally identified as a former St. Sophia church — standing within the inner precinct of Amasra Castle on the Black Sea promontory. The building's origins are Byzantine, likely dating to the middle Byzantine period (9th–12th centuries), when Amasra functioned as a regional ecclesiastical and administrative centre. Its stone construction, thick walls, and the outline of an apse visible on the eastern exterior face are characteristic of Byzantine religious architecture in the region. The Genoese, who controlled Amasra from the 13th century until the Ottoman conquest of 1460, retained the building as a church and likely made repairs during their occupation. Following the Ottoman capture of the city by Sultan Mehmed II, the structure was converted to Islamic use and renamed the Fatih (Conqueror) Mosque — a pattern of rededication common across newly conquered Byzantine towns of the period. The minaret, which is the building's most visibly Ottoman addition, rises at the northwest corner and is of relatively modest dimensions compared to later Ottoman mosque minarets. The interior retains a simple rectangular plan; original Byzantine decorative features have not survived intact, though the stone walls and arched openings reflect the original fabric. The mosque remains in active use as a place of worship, serving the small residential community still living within the castle walls and visitors to the castle precinct. Entry is free and open to visitors outside the five daily prayer times; dress codes for mosque entry apply.