The Second Council of Lyons, also known as the Fourteenth Ecumenical Council, was a major event in Christian history that took place in 1274. This council was called by Pope Gregory X and was attended by hundreds of bishops, representatives of European monarchs, and theologians from various Christian denominations. The Council's primary purpose was to address the issue of the East-West Schism that had divided the Christian Church for over two centuries. Synonyms for the "Second Council of Lyons" include the "Fourteenth Oecumenical Council," the "Council of Lyons II," and the "Latin Ecumenical Council of 1274." Overall, this historic council played a significant role in shaping Christian theology and history.