Fos Ilaron -Vespers. Arr. T. Xirellis

The earliest known Christian hymn (3rd c. AD) outside of text from the Holy Bible. Known as the 'Lamp lighting Hymn', a perpetual lamp was kept burning in the tomb of Christ and this was sung as Christians came in the evening to receive light from the lamp. Sung during Orthodox Christian vespers.
Translation:
Gladsome light of the Father’s glory, Holy, Heavenly and Immortal; and Holy blessed Jesus Christ! As we come to the setting of the sun and see the evening light, we praise you with loud voices, O Son of God and Giver of Life; for this the universe glorifies you.