The Church Tradition attaches the O' Antiphons on the Magnificat at Evensong. Fr. will give a short Meditation on each: O Sapientia (17th), O Adonai (18), O Radix Jesse (19), O Clavis David (20), O Oriens (21), O Rex Gentium (22), O Emmanuel (23). The 8th at Morning Prayer: O Virgo Virginum (24th).