Located on Vali Fuat Bey Avenue and popularly known as “Fırfırlı Church”, this building was originally the “Church of 12 Apostles” and its date of construction is not known since there is no remaining inscription.

The building is a basilica planned with three naves vertical to the abscissa. The central nave is covered with a dome of four tromps and the side naves with four crosswise vaults. The dome and the vaults are built of basalt stones.

The building is a basilica planned with three naves vertical to the abscissa. While the middle nave has a dome with four proboscis, naves at sides are covered with four cross vaults each. The middle nave is wider than side naves and its third dome starting from the entrance has 24 windows. Domes and vaults in the building are placed upon basaltic columns with muqarnas head in the middle and upon half columns at sides adjacent to the wall. Half columns appear as decorative elements in outer faces of the building. 

The abscissa, when converted into a mosque, was filled and turned to a window. The abscissa and pastoforion cells at sides stretch out. The western entrance is half-domed inside and with pointed arch outside, made of pink marble. On the gate, there is a three-faced balcony with three windows reminding the balcony of Dabbakhane Mosque. The narthex and gynacaion sections seen in other churches in Urfa are not seen in this building.

The stone workmanship especially in the western side and the corner towers are fascinating. When converted to a mosque, one of the windows to the south has been turned to a niche and a stone pulpit built before the semi column in the centre of the southern wall. The inscription reads that the mosque was converted to a mosque in 1956 (1376). Before converted to mosque, the church was used as jailhouse for some time.