Wolfgang Amadeus Mozart completes his chamber piece "Eine kleine Nachtmusik"
On August 10, 1787
- Jan 1 Arthur Middleton, US farmer (signed Declaration of Independence), dies at 44
- Feb 12 Ruggiero Boscovich, Italian physicist/astronomer/philosopher, dies at 75
- Feb 13 Ruđer Bošković, Croatian scientist and diplomat (b. 1711)
- Feb 13 Charles Gravier, comte de Vergennes, French statesman and diplomat (b. 1717)
- Mar 2 Jean SOME Allamand, French theologist/natural philosopher, dies at 73