One of a remarkable series of works Schubert wrote in his final year, Mass No. 6 in E flat lay unperformed until a year after his death. With an unusually prominent part for trombones, this is a powerful and disquieting masterpiece, reconciling the liturgical grandeur and monumentality of the vast fugues that end the Gloria and Credo, with the composer's natural lyricism and daring chromatic digressions.