The research on the pre-Vulgate manuscripts has been enormously interesting and, not surprisingly, has created areas of disagreement about aspects of Gratian’s life, work, and teaching. These scholarly debates have given birth to a fruitful and vigorous exploration into the teaching and development of law in the first half of the twelfth century.5 The issues are many. Perhaps the most important is the lack of consensus about how long Gratian worked on the Decretum and how long he taught. That will be the focus of this Essay.
Kenneth Pennington, The Biography of Gratian, The Father of Canon Law, 59 VILL. L. REV. 679 (2014).