The Missa Dei Filii ZWV 20 ranks among the later works of the Bohemian composer Jan Dismas Zelenka. It belongs to an incompletely transmitted cycle of six masses which the composer himself designated as “Missae ultimae.” Contrary to the two other “Missae ultimae”, the Missa Dei Filii consists only of a Kyrie and Gloria.

Matthias Grünert’s piano vocal score is based on the critical edition of the score edited by Paul Horn in volume 100 of the Erbe deutscher Musik, in which the gaps in the musical text found in the autograph towards the end of the Gloria were cautiously supplemented.