Romanian Orthodox Church's population is 18,806,428.
Romanian Orthodox Church was created in 1872.
Old Calendar Romanian Orthodox Church was created in 1925.
St. Stefan's Romanian Orthodox Church was created in 1924.
The Romanian Orthodox Church mainly follows the liturgical practice of the Greek Orthodox Church, rather than the Russian Orthodox Church, such as the use of the new calendar.
Transylvania is a historical regioan in the central part of Romania. The dominant religious body in Romania is the Romanian Orthodox Church, its members are about 86.7 % of the romanian population.
Syriac Orthodox Church's population is 5,600,000.
The population of Polish Orthodox Church is 600,000.
Japanese Orthodox Church's population is 30,000.
The population of Orthodox Church in America is 1,000,000.
Because the Romanian Orthodox Church adopted the new (Gregorian) calendar in 1924, along with the Greek Orthodox Church. The largest Orthodox church (the Russian Orthodox) continued to use the old (Julian) calendar, along with the Serbian Orthodox, to celebrate Christmas on 7 January each year.
The population of Estonian Apostolic Orthodox Church is 20,000.
The population of Ethiopian Orthodox Tewahedo Church is 45,000,000.