Antoninus Pius (138 - 161 CE)

Antoninus Pius (10 July 138 - 7 March 161 CE). Titus Aurelius Fulvus Boionius Arrius Antoninus was adopted by Hadrian on February 25, 138, and was acting ruler from this time until his formal accession upon the death of the emperor on July 10, when he became Titus Aelius Hadrianus Antoninus Augustus Pius. His patient, judicious and impartial reign was the longest since Augustus. He was the fourth of the "Five Good Emperors."