Tchaikovsky Themed Puzzle - for lovers of classical music

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Across
  1. 3. Tchaikovsky's nationality
  2. 4. Official reason of his death
  3. 5. Celebration for the Napoleonic Wars
  4. 6. Put on Swan Lake with a happy ending
  5. 7. His last symphony before he died
  6. 8. Ballet piece Disney re-made as a movie
  7. 9. His most famous ballet piece
Down
  1. 1. His middle name
  2. 2. Song played during the USSR's collapse