1687

1687 was a year.
==Events==
===Dated===
On 5 July 1687, Isaac Newton published Philosophiæ Naturalis Principia Mathematica, which explained his theory of gravity. (PROSE: Time Traveller's Diary)
===Undated===
A gunpowder explosion destroyed the roof of the Parthenon. (PROSE: The Slitheen Excursion)