
Summa on Virtues and Vices
Summa de Virtutibus et Vitiis
The Summa de Virtutibus et Vitiis by the Dominican friar William Peraldus, printed by Johann Amerbach in Basel in 1497. This comprehensive moral handbook treats the virtues and vices systematically, drawing on Scripture, the Fathers, and Aristotle. It was one of the most widely circulated theological texts of the later Middle Ages, used extensively by preachers and confessors. This copy is from the Bayerische Staatsbibliothek (BSB).
Author

William Peraldus
Guillelmus Peraldus
1200–1271