Simon of Tournai was a theological master who flourished in the Paris of the 1160s and enjoyed considerable renown. According to the chronicles of Matthew Paris, Simon was an outstanding teacher gifted with a remarkable memory; after teaching the liberal arts for ten years, he lectured in theology and quickly amassed a large audience. Scribes in three thirteenth-century manuscripts declare him a celebrated doctor of Paris and his work very famous.

Composed between 1160 and 1165, Simon’s Institutiones in sacram paginam is among the earliest treatments of the Incarnation after the Sentences of Peter Lombard (ca. 1157/8). In it, Simon provided precise and lucid treatments of fundamental topics regarding the person of the incarnate Christ. Indeed, the Institutiones has proved an important witness to the development of Christology in the late twelfth and early thirteenth centuries and had a strong and lasting influence on the theology of the Middle Ages. Simon’s theological insights found their way into the writings of William of Auxerre, Peter of Poitiers, Alan of Lille, Radulphus Ardens, Peter of Capua, and Albert the Great among others. Modern masters have corroborated this legacy: in his study of scholastic method, Martin Grabmann believed Simon showed great individuality of thought, and Jacques Le Goff considered him one of the pioneers in the development of the concept of purgatory.

This first critical edition with translation of the questions on the incarnate Christ from the Institutiones aims to make Simon’s Christology accessible to a range of readers. The introduction surveys the life and writings of Simon, details the theological debates of the twelfth century and Simon’s place in them, and analyzes the sources and reach of his rich treatment of the union of human and divine natures in the person of Christ. The extensive and detailed notes to the text bring to bear a wealth of additional Latin materials, much of it still unedited, with a view to situating Simon’s theories within their historical and doctrinal contexts. The volume will be of interest to scholars and students interested in early scholastic theology, and in particular in the deepening Christological controversies that came to animate the period.