Deaths on March 21

Henri Sauval, French historian and author (b. 1623)

Henri Sauval (5 March 1623 (baptised) – 21 March 1676) was a French historian.

2 Jun

Battle of Palermo
Franco-Dutch War: France ensured the supremacy of its naval fleet for the remainder of the war with its victory in the Battle of Palermo.
30 Jul

Bacon's Rebellion
Nathaniel Bacon issues the "Declaration of the People of Virginia", beginning Bacon's Rebellion against the rule of Governor William Berkeley.
12 Aug

King Philip's War
Praying Indian John Alderman shoots and kills Metacomet, the Wampanoag war chief, ending King Philip's War.
19 Sep

Bacon's Rebellion
Jamestown is burned to the ground by the forces of Nathaniel Bacon during Bacon's Rebellion.
21 Nov

Rømer's determination of the speed of light
The Danish astronomer Ole Rømer presents the first quantitative measurements of the speed of light.