Introduction
The dispute, distinctive of the Middle Ages, between
the papacy and the empire became very serious under Pope Innocent IV and
Emperor Frederick II. Already in 1240 Pope Gregory IX had tried to define the
questions between the two powers by calling a general council, but Frederick II
by arms had prevented the council from meeting. When Innocent IV succeeded as
pope in 1243 he gave his earnest attention to renewing this policy. He was able
to make his way in 1244 to Lyons, which was outside the direct authority of the
emperor, and there proclaimed a council. Some letters of summons exist, dated 3
January 1245 and the days following, in which the purpose of the
council is stated thus: "That the church, through the
salutary counsel of the faithful and their fruitful help, may have the dignity
of its proper position; that assistance may speedily be brought to the unhappy
crisis in the holy Land and the sufferings of the eastern empire; that a remedy
may be found against the Tartars and other enemies of the faith and persecutors
of the christian people; further, for the issue between the church and the
emperor; for these reasons we think that the kings of the earth, the
prelates of the church and other princes of the world should be summoned".
The chief purposes for which the council was called -- and from the beginning
it was called "general" -- seem to have been political ones.











