"Vita Karoli Magni" from Einhardus (Einhard). Einhardus (IXth century) was a Frankish scholar and courtier. Einhard was a dedicated servant of Charlemagne and his son Louis the Pious.
"De unitate intellectus contra Averroistas" from Thomas Aquinas. Thomas Aquinas (1225-1274), sanctus, doctor Ecclesiae catholicae, theologus italianus et philosophus mediaevalis.