Count Franz von Walsegg commissioned this work, which was completed at the behest of the wife of its composer, Constanze.
This work, which bears compositional similarities to its composer's earlier "Sparrow" work in a similar genre, contains a movement that opens in 12/8 time with two violins exchanging notes, one playing low single quarter notes and the other playing higher eight notes. Count Franz von Walsegg commissioned this work, which was completed at the behest of the wife of its composer, Constanze. This work's introit, Kyrie, and nine bars of the Lacrimosa movement were completed before its composer's death. For 10 points, name this mass that was completed by Franz Xaver Sussmayr after the death of its composer, who also wrote Eine Kleine Nachtmusik.
This work, which bears compositional similarities to its composer's earlier "Sparrow" work in a similar genre, contains a movement that opens in 12/8 time with two violins exchanging notes, one playing low single quarter notes and the other playing higher eight notes.
Wolfgang Amadeus Mozart's Requiem Mass in D Minor [prompt on Requiem; accept K. 626]