The Meditations - Full text of the twelve books, from the MIT Internet Classics Archive. Marcus Aurelius Antoninus - Article from the Catholic Encyclopedia. Wikipedia: Marcus Aurelius - Illustrated biography of the emperor in this online encyclopedia. Emperor Marcus Aurelius - An overview of his life and reign from the Illustrated History of the Roman Empire. Epistle of Marcus Aurelius to the Senate - Gives the text of this letter in which the emperor gives credit for his victories to the Christians. On the Virtue of Antoninus Pius (r. 138-161 CE) - Text of this work by Marcus Aurelius. The Reign of Marcus Aurelius - The Ancient History Sourcebook presents a 4th century profile written by Eutropius.