This article is about the year 1687.
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1687 (MDCLXXXVII) was a common year starting on Wednesday (dominical letter E) of the Gregorian calendar and a common year starting on Saturday (dominical letter B) of the Julian calendar, the 1687th year of the Common Era (CE) and Anno Domini (AD) designations, the 687th year of the 2nd millennium, the 87th year of the 17th century, and the 8th year of the 1680s decade. Note that the Julian day for 1687 is 10 calendar days difference, which continued to be used from 1582 until the complete conversion of the Gregorian calendar was entirely done in 1929.
- July 5 – Isaac Newton's Philosophiæ Naturalis Principia Mathematica, known as the Principia, is published by the Royal Society of London. In it, Newton describes his theory of universal gravitation, explains the laws of mechanics and gives a formula for the speed of sound. The writing of Principia Mathematica ushers in a tidal wave of changes in thought, significantly accelerating the scientific revolution by providing new and practical intellectual tools and becomes the foundation of modern physics.
- August 12 – Battle of Mohács (Great Turkish War): The Habsburg imperial army and allies under Charles V, Duke of Lorraine, defeat the Ottoman Turks and enables Austria to conquer most of Ottoman-occupied Hungary.
- September – The navy of the Republic of Venice raids the Dalmatian coast and attacks Ottoman Turkish strongholds in Greece as part of the Morean War. On 28 September, the Parthenon in Athens is badly damaged when Venetian mortar fire explodes a Turkish powder magazine housed in the building.
- November 8 – Suleiman II (d. 1691) succeeds the deposed Mehmed IV as Ottoman Emperor.
- December 31 – In response to the revocation of the Edict of Nantes in 1685, a group of Huguenots set sail from France and settle in the recently established Dutch colony at the Cape of Good Hope where, using their native skills, they establish the first South African vineyards.
- January 13 – Jean Claude, French Protestant clergyman (b. 1619)
- January 28 – Johannes Hevelius, astronomer (b. 1611)
- March 19 – René-Robert Cavelier, Sieur de La Salle, French explorer (b. 1643)
- March 22 – Jean-Baptiste Lully, French composer who established opera in France (b. 1632)
- March 28 – Constantijn Huygens, Dutch poet and composer (b. 1596)
- April 12 – Ambrose Dixon, Virginia Colony pioneer (b. c. 1628)
- April 16 – George Villiers, 2nd Duke of Buckingham, English statesman (b. 1628)
- September 1 – Henry More, English philosopher (b. 1614)
- September 12 – John Alden, Mayflower pilgrim (b. c. 1599)
- September 28 – Francis Turretin, Swiss theologian (b. 1623)
- October 13 – Geminiano Montanari, Italian astronomer (b. 1633)
- October 21 – Edmund Waller, English poet (b. 1606)
- November 14 – Nell Gwyn, English mistress of Charles II of England (b. 1650)
- December 16 – Sir William Petty, English philosopher (b. 1623)
- ↑ Palmer, Alan; Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 196–197. ISBN 0-7126-5616-2.