The First Council of Lyon took place in 1245 and was convened by Pope Innocent IV. It aimed to address various issues within the Catholic Church, including the need for reform and the ongoing conflict with the Holy Roman Empire. The council also sought to strengthen the church's authority and resolve disputes among bishops. One significant outcome of the council was the excommunication of Frederick II, the Holy Roman Emperor, due to his failure to cooperate with the church. The council emphasized the importance of unity and discipline within the church, setting the stage for future ecclesiastical gatherings.