Proper noun
English Wikipedia has an article on:Bulgarian Orthodox ChurchWikipedia
Bulgarian Orthodox Church
One of the autocephalous Eastern Orthodox Christian churches.
More recently, Bulgarian claims were also aligned with the Bulgarian exarchate—the ecclesiastical territory of the Bulgarian Orthodox Church, which split from the Greek Patriarchate in 1872. Source: Internet
The Bulgarian Orthodox Church pays respect to the memory of St. Athanasius the Great two times a year - on May 2 ( the day of his death) and on January 18, when his last return as Patriarch of Alexandria took place. Source: Internet