Final Answer:
The Council of Tours took place in 813 AD. It was significant for confirming the Filioque clause in the Nicene Creed, signifying the Holy Spirit's procession from both the Father and the Son. The major player was Charlemagne, the Holy Roman Emperor.
Step-by-step explanation:
Council of Tours (813 AD): The Council of Tours occurred in 813 AD, during the Carolingian Empire, and had profound implications for the theological understanding of the Holy Spirit's procession.
Confirmation of Filioque Clause: The Filioque clause, asserting the Holy Spirit's procession from both the Father and the Son, was a focal point. The council played a role in solidifying this theological stance, contributing to the eventual East-West Schism in Christianity.
Major Player - Charlemagne: Charlemagne, also known as Charles the Great, was the Holy Roman Emperor and a key figure at the Council of Tours. His influence and support for the Filioque clause had a lasting impact on the theological landscape of Christianity.
Exclusion of Other Players: While there were other participants at the Council of Tours, Charlemagne's role in supporting the Filioque clause distinguishes him as the major player in this historical event.