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Anglican Patrimonial tidbit: In the Anglican tradition the Thursday in Holy Week is called 'Maundy Thursday', and the Thursday of the Ascension of the Lord is called 'Holy Thursday'. It is for this reason there are so many poems entitled 'Holy Thursday' written by English authors that concern not Holy Week but rather Our Lord's Ascension and Session at the right hand of the Father.
The following prayers are some of the most ancient to be found in Christendom:
APPEAR, O Lord, make thyself known, O Lord, as thou didst appear manifest in the flesh; born of a Virgin, found by the shepherds, recognised in power, proclaimed by the Star, adored with gifts, manifest in the river, believed on in faith, received up in the cloud and promised again by him that announced it: that by the grace of this holy festival thy Church may now receive thy joys, as once it made known thy mysteries.
Mozarabic Missal

Liturgy of SS. Adai and Mari
BEFORE the glorious seat of thy majesty, O Lord, and the exalted throne of thine honour, and the awful judgment-seat of thy burning love, and the absolving altar which thy command hath set up, and the place where thy glory dwelleth, we, thy people and the sheep of thy fold, do kneel with thousands of the cherubim singing ALLELUIA, and many times ten thousand seraphim and archangels, acclaiming thine holiness, worshipping, confessing and praising thee at all times, O Lord of all, Father, Son and Holy Spirit for ever.
Chaldean Liturgy
Our Lady, Guardian of Plants, pray for all of us upon the earth.
Our Lady, Guardian of Plants, pray for all of us upon the earth.