Answer:
He rewrote the Roman legal code, the basis for civil law even today.
Explanation:
Justinian I had an impact on the Byzantine Empire in an attempt to reunite the Roman Empire as he rewrote the Roman legal code, which is the basis for civil law even today.
Justinian I, also known as Justinian the Great, was the Eastern Roman emperor from from 527 to 565. He rewrote the Roman legal code and made some amendments in it which is became the basis of the current civil law.
