Prior to Palm Sunday, all the crucifixes, statues and paintings of the saints have been covered (veiled) by purple cloth or sewn coverings. Only the Stations of Cross are not covered. The veiling is removed at the Gloria of Holy Saturday Mass. Palm Sunday is the memorial of Christ's "triumphant," but misunderstood, entry into Jerusalem, the day that begins Holy Week. This entry into Jerusalem is seen as the prophetic fulfilment of Zacharias 9: 9-10 :
"Rejoice greatly, O daughter of Sion, shout for joy, O daughter of Jerusalem: BEHOLD THY KING will come to thee, the just and saviour: he is poor, and riding upon an ass, and upon a colt the foal of an ass. And I will destroy the chariot out of Ephraim, and the horse out of Jerusalem, and the bow for war shall be broken: and he shall speak peace to the Gentiles, and his power shall be from sea to sea, and from the rivers even to the end of the earth."
Before the Mass is the Blessing of the Palms, which includes an Antiphon, Psalms, and Gospel reading. Then comes the Procession with hymns, when we carry the palms either around the church or outside, weather permitting, and then the Mass, during which there is a very long reading sung in three parts by three deacons (or priest and deacons such as the case may be) - a long recitation of the Passion, including Matthew 26: 36-75 and Matthew 27: 1-60.