 His discography also included pieces by more obscure German baroque musicians such as Nikolaus Bruhns.Like his younger contemporary Anton Heiller, Kraft also composed a fair amount (mostly organ music but also an oratorio called "Christus"), though as with Heiller, his fame as a performer completely upstaged his hopes of lasting renown as a creator.Once he retired in 1972 from the Marienkirche post, he apparently planned to write an opera, but never finished any such work.