Caesarius of Arles: Life, Testament, Letters - Paperbackby Caesarius Of Arles (Author), William E. Klingshirn (Commentaries by), William E. Klingshirn (Translator) Caesarius was born in 469 70 and served as Bishop of Arles from 502 until his death in 542. Originally trained as a monk at L? rins, he devoted himself as Bishop to an ambitious programme of church reform and Christianization inspired by strict monastic standards of piety. Best known as a preacher, with a corpus of over 250 sermons, Caesarius