The Evolution of the Ius commune

Libri Legales

Cambridge, Mass. Harvard Law Library 63, fol. 3v
Justinian, Codex 1.1.1

Roman Law in Bologna

 

Justinian's Corpus iuris civilis: Digest, Codex, Institutes, Novellae (Authenticum) (=Authenticae, inserted into Codex)

Codex Florentinus Firenze, Laurenziana, sine numero

Digestum vetus  Dig. 1.1-24.2

Infortiatum  Dig. 24.3-38.17

Digestum novum Dig. 39.1-50.17

Codex 1-9 and Tres libri 10-12 (Libri terribiles)

Epitome Iuliani

Authenticum (97 Novellae from 168) 9 + 3 = 12 Collationes

Pepo (1075)
Irnerius († ca. 1125)
The Four Doctors of Roman Law: Bulgarus (ca. 1130-1160), Martinus (ca. 1150-1160), Jacobus (ca. 1150-1169), and Hugo (ca. 1144-1166)
Placentinus † ca. 1192, Azo   ca. 1220

Accursius (Ordinary Gloss to the Corpus iuris civilis)
 

Roman Law in Gratian's Decretum 

Three Recensions

Gratian 1 ca. 1125-1130

Gratian 2 ca. 1135

Gratian 3 ca. 1140

Roman Law in Gratian: Dictum Primum

Causa 3 Causa 15

St Gall

Causa 29

St Gall

Want to know more about the history of canon law before Gratian? read Pennington, A Short History of Canon Law

Legista sine canonibus parum valet, canonista sine legibus nihil

A Civil Lawyer without a knowledge of canon law is worth little, a canon lawyer without a knowledge of Roman law is worth nothing.

 

Stuttgart, Württembergische  Landesbibliothek jur. 71, fol. 33r 
Italian (saec. XII.1) Justinian's Codex   

K. Pennington, "The Beginning of Roman Law Jurisprudence and Teaching in the Twelfth Century:  The Authenticae,"  Rivista internazionale di diritto comune 22 (2011)  35-53

Map of the Spread of Law Schools and Universities

Iuris Utriusque  Doctor (J.U.D.)

Pope Honorius III, Super specula (1219)

Influence of the Ius commune on Secular LawThe Kingdom of Sicily

Kingdom of Sicily in the Twelfth Century

Christ's Crowning Roger II

Mosaic in Santa Maria dell'Ammiraglio (La Martorana) Palermo