When and where
1274 in Lyons, France
Crisis or controversy
A marked decline of the detachment of the popes from the
things of the world;
Chronic restiveness of the Greeks toward Roman primacy.
500 bishops; 570 priests, and the following notables:
Convened: Gregory X, Pope;
St. Thomas Aquinas,
Ratified: Gregory X, Pope.
Decrees and resolutions
General reformation of the morals of clergy
Dogmatic constitution of
Profession of faith of Greek Emperor Michael VIII.