Chorale cantata (Bach)
Chorale cantatas by Johann Sebastian Bach are church cantatas in which both text and music are based on one Lutheran hymn. In his second annual cycle in Leipzig, beginning with the first Sunday after Trinity of 1724, he planned to compose a chorale cantata for each occasion of the liturgical year. He composed new works until Palm Sunday of 1725 (less than a full year later), and in later years added several works for the occasions he had omitted. This cycle, also termed the "chorale cantata year", has been named "the largest musical project that the composer ever undertook".
History
Hymns in Lutheranism
The reformer Martin Luther advocated the use of vernacular hymns during services. He wrote several himself, also worked on their tunes, and helped publish four of them in the First Lutheran hymnal, the Achtliederbuch. Leipzig also had a strong tradition of sacred hymns. In 1690, the minister of the Thomaskirche, Johann Benedikt Carpzov, had announced that he would preach not only on the Gospel but also on a related song, "good, beautiful, old, evangelical and Lutheran song", and that Johann Schelle, then the director of music, would play the song before the sermon.