Theodosius II. succeeded his father May 1, 408, at the age of eight. The translation of the remains of Chrysostom took place at the beginning of 438. Theodosius died in 450, and the phrase “ὁ νῦν βασιλεὺων” thus limits the composition of the History. As however Theodoret does not continue his list of bishops of Rome after Cælestinus, who died in 440, we may conclude that the History was written in 438–439. But the mention of Isdigirdes II. in Chap. xxxviii. carries us somewhat further. Possibly the portions of the work were jotted down from time to time.