Azzone Dei Porci

Also called  Azzone Soldanus , Latin  Azolinus Porcius, Azzone  also spelled  Azo  or  Azzo  a leader of the Bolognese school of jurists and one of the few to write systematic summaries (summae) rather than textual glosses of Roman law as codified under the Byzantine emperor Justinian I (6th century AD). His Summa codicis and Apparatus ad codicem together provided a methodical exposition of Roman law and were very influential