As a sect , the Nestorians were often persecuted as heretics by the Byzantine Empire , but Bahrain was outside the Empire 's control offering some safety .
Bahrain was a center of Nestorian Christianity until al - Bahrain adopted Islam in 629 AD .
As a sect , the Nestorian Christianity were often persecuted as heretics by the Byzantine Empire , but center was outside the Empire 's control offering some safety .
Bahrain was a center of Nestorian Christianity until al - Bahrain adopted Islam in 629 AD .