The first mission of Archimandrite Zephaniah (Sokolsky) in Transcaucasia in 1861-1862: the beginning of research into the question of the possibility for the Urmia Assyrian Nestorians to join Orthodoxy. БСТДС. 2026;(2 (35):68-90. doi:10.51216/2687-072X_2026_2_68-90