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 Marcus Aurelius Antoninus (/ɔːˈriːliəs/ ə-REE-lee-əs; ^{Latin: [ˈmaːrkʊs̠ au̯ˈreːlijʊs̠ an̪t̪oːˈniːnʊs̠]; 26 April 121 – 17 March 180 AD) was Roman emperor from 161 to 180 and a Stoicphilosopher. He was the last of the rulers known as the Five Good Emperors (a term coined some 13 centuries later by Niccolò Machiavelli), and the last emperor of the Pax Romana, an age of relative peace and stability for the Roman Empire. He served as Roman consul in 140, 145, and 161.}

^{Marcus married Antoninus' daughter Faustina in 145. After Antoninus died in 161, Marcus acceded to the throne alongside his adoptive brother, who took the name Lucius Verus.}

^{The reign of Marcus Aurelius was marked by military conflict. In the East, the Roman Empire fought successfully with a revitalized Parthian Empire and the rebel Kingdom of Armenia. Marcus defeated the Marcomanni, Quadi, and Sarmatian Iazyges in the Marcomannic Wars; however, these and other Germanic peoplesbegan to represent a troubling reality for the Empire.} 

^{The Antonine Plague broke out in 165 or 166 and devastated the population of the Roman Empire, causing the deaths of five million people. Lucius Verus may have died from the plague in 169.}

^{Unlike some of his predecessors, Marcus chose not to adopt an heir. His children included Lucilla, who married Lucius, and Commodus, whose succession after Marcus has been a subject of debate among both contemporary and modern historians. The Column and Equestrian Statue of Marcus Aurelius still stand in Rome, where they were erected in celebration of his military victories. Meditations, the writings of "the philosopher" – as contemporary biographers called Marcus, are a significant source of the modern understanding of ancient Stoic philosophy. They have been praised by fellow writers, philosophers, monarchs, and politicians centuries after his death.}