Church of Saint Jacob of Nisibis

Mor Yakup Church , also known as Church of Saint Jacob in Nisibis, is a historic Syriac Orthodox church in Nusaybin, southeastern Turkey. Archaeological excavations revealed that the 4th-century church building was originally the baptistery of a cathedral, which no longer exists.

The Syriac Orthodox church is located in Nusaybin ilçe , formerly Nisibis, of Mardin Province in southeastern Tırkey. It is situated around 100 m east of the Zeynel Abidin Mosque Complex. The church is dedicated to Syriac Jacob of Nisibis, who became bishop of Nisibis by appointment of Episcopal congress, convened in Virgin Mary Church of Diyarbakır in 309, and was later venerated saint . The church was built by Jacob of Nisibis between 313–320. It is considered as one of the oldest churches in Upper Mesopotamia. According to some inscriptions and texts, the church was built as the baptistery of a cathedral at that place. However, it was converted to a church after the cathedral and some other buildings were ruined.

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