Bruckner's early Masses

Anton Bruckner was a devoutly religious man, and composed numerous sacred works. Among these religious works, he composed seven masses, two requiem, and sketched two other masses and another requiem.

The three early masses, composed between 1842 and 1844 during Bruckner's stay in Windhaag and Kronstorf, were short Austrian Landmessen for use in local churches. The lost Requiem for men's choir and organ, composed in 1845, the Requiem in D minor, composed in 1849, and the Missa solemnis, composed in 1854, were composed during Bruckner's stay in Sankt Florian. The three masses, Mass No. 1 in D minor, Mass No. 2 in E minor and Mass No. 3 in F minor, which Bruckner composed after his eight-year study period by Simon Sechter and Otto Kitzler, are the most advanced and elaborate of these compositions.

Between 3 October 1841 and 23 September 1845, during his stay as schoolteacher's assistant in Windhaag and Kronstorf, Bruckner composed three Landmessen, the Windhaager Messe, the Kronstorfer Messe and the Messe für den Gründonnerstag. These masses were intentionally simple, because they were intended for the meagre resources of the local village churches.

During this period (c. 1845) Bruckner also composed a 17-bar sketch for the Kyrie in G minor of a Missa pro Quadragesima (Mass for Lent) for mixed choir, three trombones and organ (WAB 140).

Theses compositions are put in Band XXI of the Gesamtausgabe.

Between 23 September 1845 and 24 December 1855, during his stay as organist in Sankt Florian, Bruckner composed a lost requiem, the Requiem in D minor and the Missa solemnis.

...
Wikipedia