Source

Notated chants from the Breviary, Vagharshapat, 1877.

"This is a song from the Breviary, part of the Morning Service. One of the nine distinct hours for public worship every day, is the one to Sunrise, when Jesus appeared to his disciples. Up until the 12th century this service consisted of psalms appropriate for the hour. In the 12th century, Catholicos Saint Nerses Shnorhali enriched the ritual of the Sunrise service significantly. Currently the Sunrise service is observed during Great Lent only."