"In the early years of the eleventh century the . , the father of , deposed three popes, no man saying him nay. The removal of the right of election from the Roman nobility to the , however, brought to an end an system under which it was the Emperor who really decided who should sit on the papal throne, and was determined that lesser ecclesiastical appointments should also be taken out his hand. In the complicated feudal system, bishops and abbots often held their lands as the vassals of a suzerain lord, compounding for the military service demanded from lay vassals. It was the habit, too, of the pious to endow monasteries and churches on the condition that they held the patronage. And, in one way and another, the noble, the prince, and the emperor claimed the right of ecclesiastical investiture which in effect meant the right of nomination to the offices of the Church. This lay patronage naturally led to simony, and it was the fashion for rich abbeys and attractive bishoprics to be sold to the highest bidder, to the scandal of the faithful and the hindrance of the work of the Church."