One likely reason Johannes Brahms wrote A German Requiem was to mourn the death of his beloved mother. A German Requiem was written shortly after his mother's death in 1865.
In order to celebrate his life, she wrote a requiem.
wolfgang amadeus Mozart
Wolfgang Amadeus Mozart
Benjamin Britten wrote a nice one.
Do you mean "What is the German Requiem"? If you do, then it's a famous musical masterpiece by German composer Johannes Brahms.
It is Brahms' Requiem, also know as A German Requiem.
Mozart wrote most of the Requiem music, but died without finishing it, so some of his students finished it for him.