Archaeological excavations revealed that the 4th-century church building was originally the baptistery of a cathedral, which no longer exists.

The western part of the building has arched doors decorated with fine ornaments on the northern and southern walls.

An inscription in Ancient Greek found on the middle frieze reads: "This baptistery was built with the contribution of priest Akepsyma in 571 (359/360) when Volagesus was metropolitan.

Beneath the eastern square room's floor, there is crypt containing a sarcophagus, which is believed to belong to Mor Yakup.

The construction method of the buttresses in this section, which is also observed in many church buildings in Tur Abdin in the same region, indicates that this part was built in the 8th century.

A masonry well of 1.50 m (4 ft 11 in) depth still containing water has three different superimposed well tops, most likely due to the rising of the ground level with the dirt during all the years before.

The skeletons are found laying on the back, arms crossed on the chest and heads turned facing east.

In particular, children's graves and items were found such as glass bracelets, and necklaces made of various beads and trims.

[4][5] The foundation of the nonexistent Nisibis Cathedral, which was one of the biggest church buildings in the Middle East, and architectural structures of the Artuqids era (1101–1409) were unearthed.

Thousands of ceramic, metal, glass, and stone artifacts unearthed during the 15-year-long excavations were included in the findings of 2017 and were analyzed and registered by a group of archeologists, art historians, and conservator-restorers of the Mardin Museum.