Marcus Aurelius (; Latin: Marcus Aurelius Antoninus Augustus; 26 April 121 – 17 March 180 AD), called the Philosopher, was Roman emperor from 161 to 180. He was adopted by Antoninus Pius, whose daughter Faustina he married and whom he and his adoptive brother, Lucius Verus, succeeded. He ruled the Roman Empire with Lucius until Lucius' death in 169, and with his son by Faustina, Commodus, from 177. He was the last of the rulers traditionally known as the Five Good Emperors. He was a practitioner of Stoicism, and his personal philosophical writings, which later came to be called Meditations, are a significant source of the modern understanding of ancient Stoic philosophy.
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