(d. between 526 and c.556),
Scythian monk, famous for his contributions to chronology and canon law. He seems to have arrived in Rome soon after the death of Gelasius I (496). When called upon to construct a new Easter cycle, he abandoned the era of Diocletian and dated the first year in his Easter cycle from the (supposed) year of the Incarnation. The ‘Christian Era’ (dating years bc and ad) was adopted by Bede; it is still in use. His corpus of canon law was the first collection to gain wide influence.