Georgian Orthodox Choir of Tiflis

Armenian Apostolic Chorus of Jerusalem

Greek Orthodox triphonic Chorus of Athens

Russian Choir of the Holy Blood Church

Greek Orthodox Tetraphonic Chorus

Sofia Ecclestiastical Choir

Greek Orthodox Triphonic Chorus of Anthens

St. Cyril & Methodius Ukrainian Church Choir

St. Michael's Romanian Church Choir

Anzor Erkomaishvili

ラスタヴィ合唱団