Sieben Stücke, Op. 145 - Wikipedia
Sieben Stücke für Orgel (Seven organ pieces), Op. 145, is a collection of seven compositions for organ by Max Reger.He composed the work in three groups in 1915 and 1916. The titles of seven individual character pieces reflect aspects of World War I and Christian feasts. The compositions are based on traditional German hymns, sometimes combining several in one piece.