Archaeologists discovered a plaster cross dating back 1,400 years on Sir Bani Yas Island near Abu Dhabi.
The cross was found in the courtyard of houses first discovered in 1992, linked to a nearby church and monastery.
This discovery provides concrete evidence that the houses were part of a Christian settlement.
Experts believe senior monks lived in these small houses for prayer and fasting away from the main monastery.
Christian communities thrived in the region around the sixth century, coexisting with Muslims before the monastery was abandoned in the eighth century.