The Credo Mass has been classified as either a missa solemnis,[2] a missa brevis or a missa brevis et solemnis[1] – its performance time of approximately 25 minutes makes it difficult to categorise in a definitive manner. Its name derives from the long setting of the Credo, in which the word "Credo" is repeatedly sung in a two-note motif.[3] It thus joins a tradition of so-called "Credo Masses", including Mozart's own Kleine Credo Messe (K. 192) and Beethoven's later Missa solemnis.[4] The first performance was in Salzburg in November 1776. This is one of three masses Mozart composed in November and December 1776, all set in C major, including the Piccolominimesse (K. 258) and the Organ Solo Mass (K. 259).[5]
The work consists of six movements.
KyrieAndante maestoso, C major, 3 4
"Kyrie eleison" Allegro, C major,
GloriaAllegro assai, C major,
CredoMolto allegro, C major, 3 4
"Et incarnatus est" Andante, C major, 6 8
"[Credo, credo] Et resurrexit..." Molto allegro, C major, 3 4