Prosper of Aquitaine (390–463)
Born 390 CE, died 463 CE.
Prosper of Aquitaine (Latin: Prosper Aquitanus; c. 390 – c. 455 AD), also called Prosper Tiro, was a Christian writer and disciple of Augustine of Hippo, and the first continuator of Jerome's Universal Chronicle. Particularly, Prosper is identified with the (later) axiom 'lex orandi, lex credendi, lex vivendi'—'the law [or those things] we pray is the law we believe is the law we live.
Text from the Wikipedia article Prosper_of_Aquitaine, licensed CC BY-SA 4.0.