He used poems by Friedrich Ruckert as the basis of his Kindertotenlieder, or "Songs on the (*) Death of Children", and one of his most famous works features sections based on the hymn "Veni Creator Spiritus" and on the final scene of Goethe's Faust.
This man's second symphony features two tam-tams of contrasting timbres being played against one another in its final movement.  He used poems by Friedrich Ruckert as the basis of his Kindertotenlieder, or "Songs on the (*) Death of Children", and one of his most famous works features sections based on the hymn "Veni Creator Spiritus" and on the final scene of Goethe's Faust. These works were written by, FTP, what Austrian composer of "Symphony of a Thousand" as well symphonies commonly known as "Titan" and "Resurrection"?
This man's second symphony features two tam-tams of contrasting timbres being played against one another in its final movement.  
Gustav {Mahler}