Eusebius' Historia Ecclesiastica, IV, v.: "I have learned this much from writings, that until the siege of the Jews, which took place under Adrian, there were fifteen bishops in succession there, all of whom are said to have been of Hebrew descent, and to have received the knowledge of Christ in purity, so that they were approved by those who were able to judge of such matters, and were deemed worthy of the episcopate. For their whole church consisted then of believing Hebrews who continued from the days of the apostles until the siege which took place at this time; in which siege the Jews, having again rebelled against the Romans, were conquered after severe battles."