Justinian I, Latin in full Flavius Justinianus, original name Petrus Sabbatius, (born 483, Tauresium, Dardania, probably near modern Skopje, Macedonia)—died November 14, 565, Constantinople (now Istanbul, Turkey), Byzantine emperor (527–565), noted for his administrative reorganization of the imperial government and for his sponsorship of a codification of laws known as the Codex Justinianus (534).
Hope this helped, sorry if not tho
Learned about this in U.S. Advanced Histroy in 8th grade