In the midst of this creative activity, his health deteriorated. The cause of his death was officially diagnosed as typhoid fever, though other theories have been proposed, including the tertiary stage of syphilis. At the beginning of November he again fell ill, experiencing headaches, fever, swollen joints, and vomiting. Schubert died in Vienna, at age 31, on November 19, 1828. The last musical work he had wished to hear was Beethoven's String Quartet No.14 in C sharp minor.