Lyons I
When and where
    1245 AD in Lyon (city in E. France)
Crisis or controversy
    The difficult and heretical behavior
of Emperor Frederick II;
    The persecution of religion.
Attendees
    140 bishops; more than 300 priests;
    Convened: Innocent IV, Pope;
    Ratified: Innocent IV, Pope.
Decrees and resolutions
    Excommunication and deposition
      of Frederick II.
Cathedral where the Council of Lyons I was held.