Introduction
Leontius (c. 485 – c. 543), was a theological writer, and introduced Aristotelian definitions into theology.
Biography
Leontius was born at Constantinople, flourished during the sixth century. He is variously styled Byzantinus, Hierosolymitanus (as an inmate of the monastery of St. Saba near Jerusalem) and Scholasticus (the first "schoolman," as the introducer of the Aristotelian definitions into theology; according to others, he had been an advocate, a special meaning of the word scholasticus). He himself states that in his early years he belonged to a Nestorian community. Nothing else is known of his life; he is frequently confused with others of the same name, and it is uncertain which of the works bearing the name Leontius are really by him. For a time, he was a member of the so-called "Scythian monks" community.
Modern research has shown that Leontius of Byzantium is not the same as Leontius of Jerusalem.
Works
Most scholars regard as genuine the polemical treatises Contra Nestorianos et Eutychianos, Contra Nestorianos, Contra Monophysitas, Contra Severum (patriarch of Antioch); and the Σχόλια, generally called De Sectis. An essay Adversus fraudes Apollinaristarum and two homilies are referred to other hands, the homilies to a Leontius, presbyter of Constantinople. Leontios's collected works can be found in J. P. Migne, Patrologia Graeca, lxxxvi.