Did Irnerius teach ca. 1125-1130 at the same time as Gratianus?




Saint Omer, Bibliothèque muncipale 453, fol. 10r
Bishop Gratian Teaching		  Three Recensions of Gratianus' Decretum
 Concordantia discordantium canonum

1. St. Gall 673 ca. 1125-1130
Gratian cited Cod. 3.31.11 at C.2 q.5 dictum ante c.1

2. 5 Manuscripts ca. 1133-1135
Admont, Florence, Paris (2x), Barcelona

3. Vulgate text: over a 1000 manuscripts
 ca. 1140

 

Melodie Harris Eichbauer, "St. Gall, Stiftsbibliothek 673

and the Early Redactions of Gratian's Decretum," Bulletin of Medieval Canon Law 27 (2007) 105-139

Pennington, “La biografia di Graziano, il Padre del diritto canonico,” Rivista internazionale di diritto comune 25  (2014) 25-60