[2] The mass is scored for soloists, choir, 2 oboes,[3] 2 bassoons, 2 trumpets, 3 trombones,[4] strings (without violas[5]) and organ, the latter supplying figured bass for most of the duration.

The setting is divided into six movements: The Sanctus recalls features of the Kyrie, and also has a violin figure Mozart used again in Idomeneo.

[6] The Benedictus is peculiar for Mozart's mass settings in that it is an austere fugue in an archaic style.

This setting has a length of 136 measures and abruptly ends after the words "cuius regni non erit finis".

In the years 1989 and 2003 Dr Murl Sickbert completed the fragment; in 2006 it was performed at Hardin–Simmons University, Texas.