Aqaba Church is a historic 3rd-century church located in Aqaba, Jordan. It was unearthed in 1998 by a group of archaeologists and is considered to be the world's oldest-known purpose-built Christian church. Its first phase was dated between 293 and 303, which makes it older than the Church of the Holy Sepulchre in Jerusalem and the Church of the Nativity in Bethlehem, both of which were built in the late 320s.
Its peripheral location within the Roman Empire is likely to have saved it from destruction during the Great Persecution that broke out just a few years after the church's construction.
The Aqaba church was built sometime in the late third or the beginning of the fourth century, as indicated by the pottery finds from its foundations. Its first phase was dated between 293 and 303, which makes it older than the Church of the Holy Sepulchre in Jerusalem and the Church of the Nativity in Bethlehem, both of which were built in the late 320s. It predates Diocletian's anti-Christian persecution of 303-313, one of the greatest in Roman history, during which the building was apparently abandoned. The Great Persecution resulted in the removal of several Christian buildings in the region; this church's well-preserved status is attributed to its peripheral location within the Roman Empire. Sometime between the end of Diocletian's persecution wave and the year 330, the church was refurbished and stayed in use until its destruction during the catastrophic earthquake of 363. Its demise is dated on the basis of the latest coins found there by archaeologist, which are from 337-361. Once abandoned, the ruined building was soon filled by wind-blown sand, which helped preserve its walls to a remarkable height.
The building had the shape of a large three-aisled basilica, with a narthex, and oriented on an east-west axis. It measured 85 feet (26 m) by 53 feet (16 m), was built of mud-brick over stone foundations, with probably vaulted nave and aisles, and arched doorways. Remains of a staircase suggest that it had a second storey. The nave ended in a chancel area followed by a rectangular apse.
Archaeologists discovered walls up to 4.5 metres (15 ft) high, the foundations of a chancel screen, a collection box with coins, fragments of glass-made oil lamps, and a cemetery with 24 skeletons immediately adjacent to the church.
The church initially accommodated approximately 60 worshippers, and was expanded after the Diocletianic Persecution to accommodate up to 100 worshippers.