FTP, name this Austrian-Jewish composer best-known for the Titan Symphony, the Resurrection Symphony, and the Symphony of a Thousand.
Failed romances helped inspire this composer's song cycle Lieder eines fahrenden Gesellen and the cantata Das Klagende Lied.  Director of the Imperial Opera of Vienna from 1897-1907, his death fixation helped shape his Kindertotenlieder,or "Songs on the Death of Children", and a year after his cancer diagnosis he wrote Song of the Earth.  FTP, name this Austrian-Jewish composer best-known for the Titan Symphony, the Resurrection Symphony, and the Symphony of a Thousand.
Failed romances helped inspire this composer's song cycle Lieder eines fahrenden Gesellen and the cantata Das Klagende Lied.  
Gustav Mahler