Psalm 79 (78 LXX): O God, the nations have come into your heritage

This is obviously not a metrical Psalm, but a Greek Orthodox rendering of Psalm 79, or 78 by Septuagint numbering. In the Orthodox world the singing of this Psalm is associated with lament over the fall of Constantinople to the Ottoman Turks on tuesday, 29 May 1453. This particular video includes an English translation of the text.