Mass in D minor, K. 65

The Missa brevis No. 2 in D minor, K. 65/61a, is a mass composed by Wolfgang Amadeus Mozart and completed on 14 January 1769. It is scored for SATB soloists, SATB choir, violin I and II, 3 trombones colla parte, and basso continuo.

It is thought that this mass was performed in the University of Salzburg's Kollegienkirche to open a forty-hour vigil. As a Lenten mass, it is likely that the Gloria could not have been performed on this occasion, and would have been composed for subsequent use. This is Mozart's shortest setting of the Order of Mass, and his only missa brevis set in a minor key.

The mass is divided into six movements.

1. "Kyrie" Adagio, D minor, common time
2. "Gloria" Allegro moderato, D minor, common time
3. "Credo" Allegro moderato, D minor, 3/4
4. "Sanctus" Adagio, D minor, cut common time
5. "Benedictus" Andante, G minor, common time; soprano/alto duet
6. "Agnus Dei" Andante, D minor, common time