Justin I was Byzantine Emperor from 518 to 527. He rose through the ranks of the army and ultimately became its Emperor, in spite of the fact he was illiterate and almost 70 years old at the time of accession. His reign is significant for the founding of the Justinian Dynasty

Justinian Dynasty

The Justinian Dynasty is a family who ruled over the Byzantine Empire from 518 to 602. It originated with Justin I and ended with Maurice. Patriarch Germanus I of Constantinople , whose father was named Justinian, might have been a descendant of the dynasty...

 that included his eminent nephew Justinian I

Justinian I

Justinian I ; , ; 483– 13 or 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...

 and for the enactment of laws that de-emphasized the influence of the old Roman nobility.