While living in Rome in the 380s, Ammianus wrote a Latin history of the Roman empire from the accession of Nerva (96) to the death of Valens at the Battle of Adrianople (378), in effect writing a continuation of the history of Tacitus. He presumably completed the work before 391, as at 22.16.12 he praises the Serapeum in Egypt as the glory of the empire; it was in that same year the Emperor granted the temple grounds to a Christian bishop, provoking pagans into barricading themselves in the temple, plundering its contents, and torturing Christians, ultimately destroying the temple.