In 1054, church power was divided between the pope in rome and the patriarch in

Constantinople

Saying "church power was provided" is a mild way to describe it.  The power struggle in the church led to mutual declarations of excommunication between the pope and the patriarch and resulted in what is known as "The Great Schism" -- a monumental split between the western church (the Roman Catholic Church) and what has become known as the Eastern Orthodox Church.   "Catholic" means universal -- the Roman pope was intent on asserting his leadership over all of Christendom.  "Orthodox" means "right teaching."  The Eastern patriarch and church were asserting their teachings to be right over against positions held in the West.  There were a number of doctrinal issues debated hotly between East and West over the centuries leading up to the schism.  But more than anything, the split came down to "church power" -- who held control over the church.