Mass in D minor, K. 65

Missa brevis in D minor
Mass by W. A. Mozart
Kollegienkirche, the University Church of Salzburg, c. 1712
Key	D minor
Catalogue	K. 65/61a
Occasion	Forty-hour vigil held at the Kollegienkirche
Composed	1769 (1769): Salzburg
Movements	6
Vocal	SATB choir and soloists
Instrumental	3 trombones 2 violins continuo

The Missa brevis 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 and 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.