After the troparia and kontakia, the choir begins the Trisagion: "Holy God, Holy Mighty, Holy Immortal One, have mercy on us!" The chanting of the Trisagion at the Little Entrance is said to have been miraculously revealed to St. Proclus, Patriarch of Constantinople (434 -447). On certain Great Feasts of the church year, the Trisagion is replaced by another hymn, taken from "As many as have been baptized into Christ, have put on Christ! Alleluia!" On Feasts of the Cross, the Trisagion is replaced by the hymn, "Before Thy Cross, we bow down in worship, O Master, and Thy holy Resurrection we glorify!" During the Trisagion, or its alternate hymn, the priest and deacon go to the High Place (seats for the bishop and priests to the east of the Holy Table) to prepare for the reading of the Epistle and Gospel.