Corpus Juris Civilis
He is mentioned in a rescript of Gordian III in the year 240 in connection with a responsum which he gave to the party to whom the rescript was addressed. No fewer than 345 passages in the "Digest" of the "Corpus Juris Civilis" are taken from his writings. He is the author of a collection of Responsa and Digesta written in 12 books.