Peter Lombard (c. 1095–1160) was an Italian theologian who wrote the Book of Sentences. He was educated in Bologna, Reims, and Paris, and he taught at Notre Dame, becoming a canon there from 1144 to 1145. The Book of Sentences is structured around important theological questions and subjects: for example, “Is God the cause of Evil and Sin?” Peter first set out the question or issue, related what the position of the Church Fathers on it would have been, and then proposed his own answer or resolution.