Justinian I (c. 482 – 14 November 565), commonly known as Justinian the Great, was Byzantine Emperor from 527 to 565. During his reign, Justinian sought to revive the Empire’s greatness and reconquer the lost western half of the classical Roman Empire. One of the most important figures of Late Antiquity and the last Roman Emperor to speak Latin as a first language, Justinian’s rule constitutes a distinct epoch in the history of the Eastern Roman Empire.