This commentary is said to have been composed around 260, making it the earliest surviving commentary on Revelation. The author, St. Victorinus of Pettau flourished about 270, and was martyred during the Roman persecutions under Emperor Diocletian. The commentary does not cover every verse but focuses instead on key passages, giving mostly allegorical interpretations. He saw the Apocalypse as consisting of various subdivisions which run parallel with each other, the main theme of which is the coming Second Advent. - Summary by ancientchristian