Year 1691 (MDCXCI) was a common year starting on Monday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Thursday of the 10-day slower Julian calendar). [edit] Events of 1691 [edit] January–June [edit] July–December [edit] Undated [edit] Births [edit] Deaths - January 13 – George Fox, English founder of the Society of Friends (b. 1624)
- January 17 – Richard Lower, English physician (b. 1631)
- February 1 – Pope Alexander VIII (b. 1610)
- April 3 – Jean Petitot, Swiss enamel painter (b. 1607)
- May 11 – Colonel John Birch, English soldier (b. 1615)
- May 16 – Jacob Leisler, German-born American colonist (b. 1640)
- May 23 – Adrien Auzout, French astronomer (b. 1622)
- May 29 – Cornelis Tromp, Dutch admiral (b. 1629)
- June 23 – Suleiman II, Sultan, Ottoman Empire (b. 1642)
- July 12 – Marquis de St Ruth (killed at the Battle of Aughrim)
- July 16 – François-Michel le Tellier, Marquis de Louvois, French war minister (b. 1641)
- July 30 – Daniel Georg Morhof, German writer and scholar (b. 1639)
- August 14 – Richard Talbot, 1st Earl of Tyrconnel, Irish rebel (b. 1630)
- September 12 – John George III, Elector of Saxony (b. 1647)
- October 9 – William Sacheverell, English statesman (b. 1638)
- October 10 – Isaac de Benserade, French poet (b. 1613)
- November 14 – Tosa Mitsuoki, Japanese painter (b. 1617)
- November 15 – Aelbert Cuyp, Dutch painter (b. 1620)
- December 8 – Richard Baxter, English clergyman (b. 1615)
- December 31 – Robert Boyle, Irish chemist who formulated Boyle's Law, which states that under conditions of constant temperature, the pressure and volume of a gas are inversely proportional (b. 1627)
- probable – Elizabeth Polwheele, English playwright (b. c. 1651)
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