The Easter Vigil (Resurrection Matins and Divine Liturgy) is a marathon that makes the Roman Catholic vigil resemble a walk in the park.
The link below comes from Georgia (the country, not the state), where John Graham, a historical musicologist, lives and leads cultural tours. Click on different bits on the videos from this monastic celebration. It's really rough, "guy music," at its Caucasian best. Enjoy it!
Christ is Risen!