Symphony No.10 in F-sharp major "unfinished"

Symphony No. 10 by Gustav Mahler was written in the summer of 1910, and was his final composition. At the time of Mahler's death the composition was substantially complete in the form of a continuous draft, but not fully elaborated or orchestrated, and thus not performable. Only the first movement is regarded as reasonably complete and performable as Mahler intended. Perhaps as a reflection of the inner turmoil he was undergoing at the time (Mahler knew he had a failing heart and his wife had been unfaithful), the 10th Symphony is arguably his most dissonant work.