In 1866 Anton Bruckner composed his solemn Mass in E minor, which he revised extensively in 1876–1882. Composed for a performance in the open air, the work stands out among Bruckner’s masses and those of his contemporaries because of its scoring, omitting strings and organ in favor of an accompaniment for wind and brass instruments alone (“Harmoniemusik”). This scholarly-critical new edition of this second version takes into consideration for the first time the surviving parts from the Bruckner Archive at the St. Florian Monastery and the choral parts rediscovered in 2016 in the Linz Cathedral Choir Archive. These have enabled more precise editorial decisions to be made regarding the scoring of individual passages as well as articulation and dynamics.