Bulgarian Orthodox Church

The Bulgarian Orthodox Church (Bulgarian: Българска православна църква, romanized: Bûlgarska pravoslavna cûrkva), legally the Patriarchate of Bulgaria (Bulgarian: Българска патриаршия, romanized: Bûlgarska patriarshiya), is an autocephalous Eastern Orthodox jurisdiction based in Bulgaria. It is the first medieval recognised patriarchate outside the Pentarchy and the oldest Slavic Orthodox church, with some 6 million members in Bulgaria and between 1.5 and 2 million members in a number of other European countries, Asia, the Americas, Australia, and New Zealand.

Source: Wikipedia — Bulgarian Orthodox Church (CC BY-SA 4.0)