Marcus Aurelius

Marcus Aurelius Antoninus, born 26 April 121 and died 17 March 180, ruled as Roman emperor from 161 until his death, and was also a Stoic philosopher. He belonged to the Nerva–Antonine dynasty, the final emperor among those later called the Five Good Emperors, and the last ruler of the Pax Romana—a period of relative peace and stability that stretched from 27 BC to 180 AD. He held the office of Roman consul three times: in 140, 145, and 161.

His father, the praetor Marcus Annius Verus, and his mother, Domitia Calvilla, had him as their son. Through marriage, he was linked to emperors Trajan and Hadrian. When Marcus was three years old, his father died, and his mother and paternal grandfather raised him. In 138, after Hadrian’s adoptive son Aelius Caesar passed away, Hadrian adopted Marcus’s uncle Antoninus Pius as his new heir. Antoninus then adopted Marcus and Lucius, Aelius’s son. Hadrian died that same year, making Antoninus emperor. As the new heir to the throne, Marcus studied Greek and Latin under tutors like Herodes Atticus and Marcus Cornelius Fronto. He married Antoninus’s daughter Faustina in 145.

Upon Antoninus’s death in 161, Marcus became emperor alongside his adoptive brother, who took the name Lucius Aurelius Verus. His reign saw heavy military conflict. In the east, Rome fought the Parthian War of Lucius Verus against a revived Parthian Empire and the rebel Kingdom of Armenia. Marcus defeated the Marcomanni, Quadi, and Iazyges during the Marcomannic Wars. These and other Germanic peoples began to pose a serious problem for the empire. He lowered the silver content of the Roman denarius. Persecution of Christians appears to have grown during his rule, though his direct involvement is unlikely—no Christian sources blame him, and both Justin Martyr and Tertullian praised him. The Antonine Plague began in 165 or 166, killing five to ten million people across the empire. Lucius Verus may have died from it in 169. When Marcus died in 180, his son Commodus succeeded him.

Commodus’s succession has sparked debate among historians both ancient and modern. Marcus’s column and equestrian statue still stand in Rome, built to celebrate his military victories. As a philosopher, his work *Meditations* is a key source for understanding ancient Stoic philosophy today. Writers, philosophers, monarchs, and politicians have praised these writings for centuries after his death.

The major sources for Marcus’s life and rule are patchy and often unreliable. The most important group, the biographies in the *Historia Augusta*, claims to be by several authors around 400 AD, but scholars believe a single writer composed them around 395. Later biographies and those of subordinate emperors are unreliable, but earlier ones—based on lost sources like Marius Maximus or Ignotus—are more accurate. For Marcus, the biographies of Hadrian, Antoninus, Marcus, and Lucius are largely reliable, while those of Aelius Verus and Avidius Cassius are not. A collection of letters between his tutor Fronto and various Antonine officials survives in fragmentary manuscripts, covering roughly 138 to 166. Marcus’s own *Meditations* offers insight into his inner life but is mostly undated and rarely references worldly events. The main narrative source is Cassius Dio, a Greek senator who wrote an eighty-book history of Rome from its founding to 229. Dio is essential for military history, but his senatorial biases and opposition to expansion color his account. Other literary sources provide details: the physician Galen on Antonine elite habits, the orations of Aelius Aristides on the era’s mood, and legal constitutions in the *Digest* and *Codex Justinianeus* on Marcus’s legal work. Inscriptions and coin finds supplement these texts.

Marcus was born in Rome on 26 April 121. His birth name is sometimes given as Marcus Annius Verus, though sources assign this after his father’s death and unofficial adoption by his grandfather, upon coming of age. He may have been called “Marcus Annius Catilius Severus” at birth or in youth, or “Marcus Catilius Severus Annius Verus.” After Antoninus adopted him as heir, he became “Marcus Aelius Aurelius Verus Caesar,” and upon becoming emperor, “Marcus Aurelius Antoninus Augustus” until his death. Epiphanius of Salamis, in his chronology of Roman emperors, calls him Marcus Aurelius Verus.

His father was Marcus Annius Verus (III). The Annia clan was of Italic origin but settled in the small colony of Ucubi (Colonia Claritas Iulia Ucubi) southeast of Córdoba in Iberian Baetica (modern Andalusia, Spain); the family claimed legendary descent from Numa Pompilius. The Annii Veri rose to prominence in Rome in the late 1st century AD. Marcus’s great-grandfather, Marcus Annius Verus (I), was a senator and, according to the *Historia Augusta*, an ex-praetor. His grandfather, Marcus Annius Verus (II), was made a patrician in 73–74. Through his grandmother Rupilia Faustina, Marcus was connected to the Nerva-Antonine dynasty; Rupilia was the step-daughter of Salonia Matidia, who was the niece of Emperor Trajan. His mother was Domitia Lucilla Minor, also known as Domitia Calvilla.