THE SEQUENCES
The Sequences were religious liturgical songs, which developed from the florid vocalizations upon the last syllable of the Hallelujah. At first only a melody or tune with words, but later on it became an art form both in music and in sacred poetry. Musically often of finer quality than the hymn. The Sequences usually consisted of two verses, three lines to each verse, with the same melody for each of the two verses. The form seems to have originated at the convent of St. Gall in Switzerland, about 875 A. D. During the later part of the mediaeval era the Sequences became very popular, and the number of Sequences that were sung in the Catholic Church reached nearly one thousand. The church music decisions of the Council of Trent (1545-1563) operated very strongly against the Sequences, and so they practically disappeared about 1570. Only five Sequences were retained, namely, Victime paschali laudes, Veni Sancte Spiritus, Lauda Sion salvatorem, Stabat Mater dolorosa, and Dies Irae.