Mor Yakup Kilisesi, Nusaybin

Mar Yakov Church (Mor Yakub Church)
Church of Saint Jacob in Nisibis
Mor Yakup Kilisesi
Church of Saint Jacob and the surrounding excavation site (January 2023)
Mar Yakov Church (Mor Yakub Church) Location of the church in Turkey.
37°04′01″N 41°12′55″E / 37.06694°N 41.21528°E / 37.06694; 41.21528
Location	Nusaybin
Country	Turkey
Denomination	Syriac Orthodox or, Church of the East
History
Status	Church
Dedication	Jacob of Nisibis
Relics held	Saint Jacob of Nisibis
Architecture
Style	Late Roman and Early Byzantium architecture
Groundbreaking	313
Completed	320; 1704 years ago (320)
Specifications
Number of domes	1
Administration
District	Nusaybin
Province	Mardin

Mar Yakov Church or Mor Yakup Church (Turkish: Mor Yakup Kilisesii), also known as the Church of Saint Jacob in Nisibis, is a historic 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. It is not determined whether this church belonged to Syriac Orthodox Church or the Church of the East, but it is under the jurisdiction of the Syriac Orthodox Church which it is most likely linked to.