Final answer:
Mozart's Requiem was performed at the funeral of 35th U.S. President John F. Kennedy who died in 1963.
Step-by-step explanation:
Mozart's Requiem was performed at the funeral of U.S. President John F. Kennedy. Kennedy, the 35th President of the United States, died on November 22, 1963. His funeral was marked by a number of solemn and ceremonial events, including the performance of the Requiem. The historical significance of Mozart's Requiem being chosen for the funeral reflects the cultural and ceremonial importance placed on music to mourn and honor a national figure such as a president.