Antoninus Pius (Titus Aurelius Fulvus Boionius Arrius Antoninus) ăntōnī´nəs pī´əs [key], AD 86–AD 161, Roman emperor (138–161). After a term as consul (120) he went as proconsul to Asia, where he governed with distinction. He was adopted by the emperor Hadrian and, on succeeding him, administered the empire with marked ability and integrity. Italy was embellished with fine buildings, and the provinces were eased of much of their financial burden. During his reign the Wall of Antoninus was built in Britain. His wife was Faustina, aunt of his successor, Marcus Aurelius .
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