Johann Sebastian Bach's cantata BWV 1, entitled Wie schön leuchtet der Morgenstern ("How beautifully shines the morning star"), is a choral cantata (Choralkantate) belonging to the second annual cycle (Jahrgang) of cantatas that Bach composed in Leipzig.
It was composed in 1725 and premiered on 25 March 1725 in Leipzig for the Feast of the Annunciation of the Lord (Annunciation to the Virgin Mary), which is celebrated on 25 March. This day was an exception during Lent, as figural music was not normally allowed in Leipzig during this period, but it was allowed for the Annunciation.
The work is based on Philipp Nicolai's hymn Wie schön leuchtet der Morgenstern, published in 1599. This seven-stanza hymn is one of the most famous in the Lutheran tradition, and its melody was also composed by Nicolai (or at least published by him in 1599).
Bach used stanzas 1, 6 and 7 literally (as the opening and closing chorales), while the intermediate stanzas were paraphrased by an unknown librettist (probably the same one who prepared other texts for the second cycle) to adapt them to the context of the Annunciation, with references to the birth of Jesus in Bethlehem and the love of Christ.
The cantata consists of six movements:
- Chorus – Wie schön leuchtet der Morgenstern (stanza 1 of the hymn, complete choral treatment with cantus firmus).
- Recitative (tenor).
- Aria (soprano).
- Recitative (bass).
- Aria (tenor).
- Choral – Wie bin ich doch so herzlich froh (verse 7 of the hymn, harmonised for four voices).
It is typical of the choral cantata format of the second Leipzig cycle: it begins and ends with the chorale, and the central movements are poetically paraphrased.
The instrumentation is relatively rich for a Bach cantata and has a festive character:
- 2 horns – which add brilliance and solemnity.
- 2 oboes da caccia.
- 2 violins.
- Viola.
- Basso continuo (including cello, bassoon, organ, etc.).
- Four-part choir (SATB).
- Soloists: soprano, tenor and bass.
The oboes da caccia and horns contribute to a bright, pastoral colour, in keeping with the image of the 'morning star' and the joyful character of the Annunciation.