In the Middle Ages few authors produced commentaries on The Acts of the Apostles. Peter of John Olivi (1248-1298) authored an excellent exposition, basing himself on the previous work of Venerable Bede (672-735), Rabanus Maurus (780-856), and the Ordinary Gloss. His was a commentary mainly on the literal sense. From time to time he expounds on an allegorical meaning. His commentary stems from his lectures to Franciscan students and may date to ca. 1290.