Warum_betrübst_du_dich_mein_Herz
"Warum betrübst du dich, mein Herz" (Why are you afflicted, my heart)[1] is a Lutheran hymn. According to some sources, both hymn writer and composer are anonymous.[1] The melody, Zahn No. 1689a,[2] appeared on broadsides from the mid-16th century in Nürnberg, one of them dated 1561.[citation needed] For a while the tune had been attributed to Hans Sachs.[3][4]
Johann Sebastian composed a chorale cantata on the hymn, Warum betrübst du dich, mein Herz, BWV 138.[1]