Answer :
Answer:
In 1054 when the bishops of Rome and Constantinople excommunicated each other.
Explanation:
The difference led to excommunicated between Pope Leo IX and Eastern patriarch. The split happened in the 11th century when Pope Leo IX came to see the Patriarch, to resolve the dispute of belief in Christianity in Constantinople. They disagree and excommunicated, which started the split in 1054. The split divided Christianity into Roman Catholic and the Eastern Orthodox.