Ulpian was a Roman jurist born in Tyre. He moved to Rome and rose to become considered one of the great legal authorities of his time. He was one of the five jurists upon whom decisions were to be based according to the Law of Citations of Valentinian III, and supplied the Justinian Digest about a third of its contents.

The Digest, also known as the Pandects, was a compendium or digest of juristic writings on Roman law compiled by order of the Byzantine emperor Justinian I in 530–533 AD. It is divided into 50 books.