The three primary divisions of Christianity are Protestantism, Catholicism and Eastern Orthodoxy.:There are other Christian groups that do not fit neatly into one of these primary categories. The Nicene Creed is "accepted as authoritative by Anglican and major Protestant churches, the Roman Catholic and Eastern Orthodox ." There is a diversity of doctrines and practices among groups calling themselves Christian. These groups are sometimes classified under denominations, though for theological reasons many groups reject this classification system. A broader distinction that is sometimes drawn is between Eastern Christianity and Western Christianity, which has its origins in the East–West Schism (Great Schism) of the 11th century. As well as these modern divisions, there were many diverse Christian communities with wildly different Christologies, eschatologies, soteriologies, and cosmologies that existed alongside the "Early Church" which is itself a projected concept to indicate which communities were "proto-orthodox", in that their views would become dominate. In many ways, the first three centuries of Christianity was significantly more diverse.