The Church of Saints Sergius and Bacchus was built in honor of two Roman soldier-martyrs executed for their Christian faith around 303 CE during the Diocletian persecution. The dedication to these military saints was common in the early Christian period, particularly in regions with significant Roman military presence — the Babylon fortress nearby maintained a garrison that presumably included Christian soldiers.
The tradition linking the site to the Holy Family’s Flight into Egypt is ancient — it appears in Coptic hagiographic texts from the 5th century CE onward and was well-established by the medieval period. Medieval Arab geographers and travelers including al-Maqrizi documented the church’s significance as a pilgrimage destination. The Coptic Pope traveled annually to celebrate the liturgy in the crypt.
The church underwent significant restoration in the Fatimid period and again during the 19th century, when extensive work was undertaken to stabilize the structure against the rising water table. Despite these interventions, substantial original fabric from the early centuries of the building’s existence remains visible, particularly in the lower sections of the walls and in the granite column capitals.









