What year is marked by the Great East-West Schism?

The Great East-West Schism occurred in 1054 AD, representing a significant division between the Eastern Orthodox Church and the Roman Catholic Church. This schism was primarily a result of theological, political, and cultural differences that had developed over centuries between the Eastern and Western branches of Christianity. Key issues included disputes over papal authority and the filioque clause, which relates to the Holy Spirit's procession.

This event marked the formal separation and the beginning of distinct Eastern and Western Christian traditions, shaping the course of Christian history and leading to the establishment of two principal branches of Christianity that still exist today. Understanding this schism is crucial for grasping the development of Christian theology and ecclesiastical structures in both Eastern and Western contexts.