Career
His life was chronicled by his contemporary Anselm of Liège. During this period Liège became known as an educational center. Wazo, himself a student with Heriger of Lobbes, served as school master, under his predecessor Notker of Liège, before himself becoming bishop.
He is noted also for his nuanced approach to cases of heresy (not common in his day).
He was involved in the period 1021-1025 in a controversy with John, canon and provost in Liège. Durandus of Liège, then bishop, had Wazo leave for a time.
His election as bishop in 1041 was strongly contested, with Emperor Henry III against him.
