The name given in Nestorian
ecclesiastical sources to the area of the UAE and Oman, called Mazun
in Sasanian and some early Islamic geographical sources. Bet Mazunaye
was probably evangelised in the mid-fourth century, perhaps by a monk
called Jonah. In 424 the region's bishop, named Yohannon, participated
in a synod held in Iraq at which the independence of the Nestorian church
from its parent church in Antioch (Syria) was proclaimed and ratified.
Bishops from Bet Mazunaye are later recorded at synods held in Seleucia-Ctesiphon,
the Sasanian capital in Iraq, in 544, 576 and 676. By this time, however,
the Nestorian Christians of Bet Mazunaye had begun converting to Islam
and the acts of the synods of the Nestorian church make no more mention
of bishops from the region.
Archaeological evidence of Nestorian Christianity in the Emirates has been found on Sir Bani Yas, where the remains of a monastery have been excavated.