12 Spiritual Songs, Op.137, also called 12 geistliche Lieder für eine Singstimme mit Begleitung von Klavier, Harmonium oder Orgel is a set of 12 pieces for voice and keyboard composed in 1914 by Max Reger. They were first published that same year in Leipzig by C.F. Peters. The set is dedicated to M. Wach zugeeignet.
