What major difference between the eastern and western churches lead to there schism

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One major difference that led to the schism between the Eastern and Western churches was the issue of papal authority. The Western Church recognized the authority of the Pope in Rome as the supreme authority in matters of theology and church governance. In contrast, the Eastern Church believed in a more decentralized form of church leadership, with each region or patriarchate having a degree of autonomy.

This difference in the understanding of the role of the Pope and central authority within the church eventually led to tensions and disagreements between the two branches of Christianity. The final break in relations between the Eastern (Orthodox) and Western (Catholic) churches occurred in 1054, known as the Great Schism, largely due to the Pope's claim to universal jurisdiction and his authority over the Eastern patriarchs.