Bruckner composed the two Aequali in end January 1847 during his stay in St. Florian Abbey.

[3] The two Aequali in C minor, with 34 and 27 bars, respectively, are score for alto, tenor and bass trombones.

In the edition of the Gesamtausgabe the missing part of the bass trombone of the second Aequale has been completed by Hans Bauernfeind.

[1] The works are choral-sized with in WAB 114 a typical folklike melody in sixths.

Similar musical sets were later used in the so-called Choräle in Bruckner's later symphonies.