1645
| Years: 1642 1643 1644 - 1645 - 1646 1647 1648 | |
| Decades: 1610s 1620s 1630s - 1640s - 1650s 1660s 1670s | |
| Centuries: 16th century - 17th century - 18th century 1645 in literature 1645 in science | |
Events
- February 15 - New Model Army is founded officially
- June 14 - English Civil War: Battle of Naseby - 12,000 Royalist forces are beaten by 15,000 Parliamentarian soldiers
- June 28 - English Civil War - the Royalists lose Carlisle
- July 2: Fight at Alford, Aberdeenshire
- Siege of Basing House during the English Civil War
- Siege of Ragban Castle during the English Civil War
- The Long Parliament outlaws the 1559 version of the Book of Common Prayer
- Beginning of the Maunder Minimum, a time period when sunspots became exceedingly rare
- Founding of the Stolberg-Wernigerode branch of the family of counts of Stolberg and Wernigerode in Germany
- Battle of Lepanto
- Wallpaper begins to replace tapestries as a wall decoration
Ongoing events
Births
- Captain William Kidd, Scottish privateer and alleged pirate
Deaths
- May 19 - Miyamoto Musashi, Japanese swordsman
- July 22 - Gaspar de Guzman, Count of Olivares, Duke of San Lucar
- August 28 - Hugo Grotius
- Li Zicheng, Chinese rebel
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