The Missa brevis in D major, K. 194/186h, is a mass composed by Wolfgang Amadeus Mozart and completed on 8 August 1774.

[1] It is scored for SATB soloists, SATB choir, violin I and II, 3 trombones colla parte, and basso continuo.

This missa brevis is thought to have been composed for ordinary liturgical use in the Salzburg Cathedral,[1][2] under the directive of Archbishop Colloredo.

Mozart tried to satisfy Colloredo's demands for brevity and concision in the composition of this mass – none of the movements have an orchestral prelude, the orchestra itself is highly reduced, there is very little fugal writing, and much of the setting is homophonic.

[3] In 1793, the Lotter house published the mass posthumously;[4] it was the first of Mozart's works to appear in print.