Justinianic
/dʒəˌstɪnɪˈanɪk/adjective
Of or relating to Justinian (483–565) or the period of his reign as Byzantine Emperor (527–565); specifically = Justinianian.
Origin
Mid 19th century; earliest use found in John Mason Neale (1818–1866), Church of England clergyman and author. From the name of Justinian + -ic.