when did the orthodox and catholic church split
East–West Schism The Eastâ€“West Schism, also called the Great Schism and the Schism of 1054, was the break of communion between what are now the Catholic Church and Eastern Orthodox churches, which has lasted since the 11th century.[1]
Catholic (term) The terms "catholic", "catholicism" and "catholicity" is closely related to the use of the term Catholic Church. The earliest evidence of the use of that term is the Letter to the Smyrnaeans that Ignatius of Antioch wrote in about 108 to Christians in Smyrna. Exhorting Christians to remain closely united with their bishop, he wrote: "Wherever the bishop shall appear, there let the multitude [of the people] also be; even as, wherever Jesus Christ is, there is the Catholic Church."[12][13]