History
The Great Schism: When Christianity Split in Two

An explanation of the Great Schism of 1054, the monumental split that divided Christianity into the Roman Catholic and Eastern Orthodox churches.
What is it?
The Great Schism, also known as the East-West Schism, was the formal break of communion between the Western and Eastern branches of Christianity in 1054 AD. This event separated the church into what are now the Roman Catholic Church, centered in Rome, and the Eastern Orthodox Church, centered in Constantinople. The split was not a sudden event but the culmination of centuries of growing estrangement. Key disagreements included the Pope's claim to universal jurisdiction over the whole church and a theological dispute over a clause in the Nicene Creed known as the filioque. Cultural, political, and linguistic differences (Latin in the West, Greek in the East) also fueled the division. The schism was finalized when the Pope's envoy and the Patriarch of Constantinople excommunicated each other.
Why is it trending?
The Great Schism remains a topic of significant historical and religious importance because its consequences are still visible today. It marked the formal creation of two of the largest branches of Christianity, shaping the religious and cultural map of Europe and beyond for nearly a thousand years. Understanding this schism is crucial for comprehending the historical tensions and distinct identities of Western and Eastern Europe. Furthermore, modern dialogues and ecumenical movements between the Catholic and Orthodox churches often reference this foundational split. In 1965, the mutual excommunications were lifted, a major step in reconciliation that keeps the event relevant in contemporary theological discussions.
How does it affect people?
The Great Schism profoundly affects billions of people today by defining their religious identity as either Catholic or Orthodox. The division led to distinct theological doctrines, liturgical practices, and traditions that adherents follow. Historically, the split fueled political and military conflicts, such as the Crusades, which deepened the hostility between the Christian East and West. For many nations, particularly in Eastern Europe, the Balkans, and the Middle East, their cultural and national identity is deeply intertwined with their Orthodox faith, distinguishing them from the Catholic West. This historical division continues to influence geopolitics, inter-church relations, and the personal faith of countless individuals worldwide.