He conducted the New York Philharmonic from 1909-1911,  when he suffered a physical collapse and demanded to be returned to Vienna.  
Aside from an unfinished piano quartet and early cantata, this man wrote only song  cycles and symphonies. He conducted the New York Philharmonic from 1909-1911,  when he suffered a physical collapse and demanded to be returned to Vienna.  Terrified of writing a ninth symphony, he gave no number to The Song of the Earth.  His Resurrection Symphony is similar to Beethoven's Ninth and has a massive  choral finale. FTP name this Austrian composer of Symphony of a Thousand.
Aside from an unfinished piano quartet and early cantata, this man wrote only song  cycles and symphonies.
Gustav Mahler