Eastern Orthodoxy by country
Based on the numbers of adherents, the Eastern Orthodox Church (also known as Eastern Orthodoxy) is the second largest Christian communion in the world after the Roman Catholic Church. The most common estimates of the number of Eastern Orthodox Christians worldwide is approximately 200–260 million. The numerous Protestant groups in the world, if taken all together, outnumber the Eastern Orthodox, but they differ theologically and do not form a single communion.
Eastern Orthodox Church
However, there is definitely marked return to Christian Orthodoxy in Russia. According to the Pew Research Religion & Public Life Project, between 1991 and 2008, the share of Russian adults identifying as Orthodox Christian rose from 31 percent to 72 percent, according to a new Pew Research Center analysis of three waves of data (1991, 1998 and 2008) from the International Social Survey Programme (ISSP) – a collaboration involving social scientists in about 50 countries.