With 158 million* followers, the Orthodox Eastern Church is the second largest Christian community in the world. It began its split from the Roman Catholic Church in the fifth century; the break was finalized in 1054. The followers of the Orthodox Church are in fact members of many different denominations, including the Church of Greece, the Church of Cyprus, and the Russian Orthodox church. Orthodox religion holds biblical Scripture and tradition, guided by the Holy Spirit as expressed in the consciousness of the entire Orthodox community, to be the source of Christian truth. It rejects doctrine developed by the Western churches. Doctrine was established by seven ecumenical councils held between 325 and 787 and amended by other councils in the late Byzantine period. Relations between the Orthodox churches and Roman Catholicism have improved since Vatican Council II (1962-65).