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.
Religion in Austria
Eastern Orthodox and Oriental Orthodox churches grew over the last decades due to the coming of South Slavic immigrants from the Balkans to Austria. The largest group of Eastern Orthodox in Austria are Serbs. The Vienna Institute of Demography of the Austrian Academy of Sciences estimated in that there were 397,219 Eastern Orthodox Christians in Austria in 2016, representing the 4.6% of the total population.