Deaths on September 12

Jacob Cats, Dutch poet, jurist, and politician (b. 1577)

Jacob Cats (10 November 1577 – 12 September 1660) was a Dutch poet, humorist, jurist and politician. He is most famous for his emblem books.

13 Feb

Second Northern War
With the death of Swedish King Charles X Gustav, the Swedish government begins to seek peace with Sweden's enemies in the Second Northern War, something that Charles had refused. As his son and successor on the throne, Charles XI, is only four years old, a regency rules Sweden until 1672.
29 May

Charles II of England
English Restoration: Charles II is restored to the throne of England, Scotland and Ireland.
1 Jun

Massachusetts Bay Colony
Mary Dyer is hanged for defying a law banning Quakers from the Massachusetts Bay Colony.
17 Oct

Hanged, drawn and quartered
Nine regicides, the men who signed the death warrant of Charles I, are hanged, drawn and quartered.
28 Nov

Royal Society
At Gresham College, twelve men, including Christopher Wren, Robert Boyle, John Wilkins, and Sir Robert Moray decide to found what is later known as the Royal Society.