Victorinus, Marius, c. 285–c. 365 CE

Marius Victorinus is one of the few direct links between the Platonist schools of late antiquity and Latin theology. A professor of rhetoric in mid-4th century Rome, Victorinus is perhaps the only Latin author whose writings, composed before and after his conversion to Christianity, survive. His school works of grammar and rhetoric were used for over a millennium, and he anticipated Boethius in integrating logic and dialectic into the rhetorical curriculum. He also translated the Neoplatonic works that deeply impacted Augustine. After conversion, Victorinus composed theological works of various genres: treatises and hymns in defense of the Nicene Creed and commentaries on the Pauline epistles, the first in Latin. The treatises reveal his chief contribution to the history of Christian thought: a philosophical interpretation of the trinity that drew deeply on late antique Platonist language and conceptuality to formulate a pro-Nicene theology. His commentaries on Paul employ the grammarian’s literal treatment of the text to identify the situational context of the epistles and the apostle’s rhetorical strategy. Victorinus was a pioneer of the synthesis of Christianity and Platonism in the Latin church, which reached its heights in late antiquity with Augustine and Boethius and flowered variously in the medieval Latin church.