Execution of Charles I of England
Parliament tries its king and England becomes a republic

Defeated in civil war against Parliament, King Charles I was tried for treason and beheaded outside Whitehall Palace. England became a republic, soon dominated by Oliver Cromwell.
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Meanwhile around the world (±25 years)
Eastern Europe & Russia
- 1654 Pereiaslav Agreement — 5 years later
Africa
- 1624–1663 Nzinga becomes Queen of Ndongo — 25 years earlier
- 1662 Last sighting of the dodo — 13 years later
Asia
- 1632–1653 Building of the Taj Mahal — 17 years earlier
- 1644 Fall of the Ming, rise of the Qing — 5 years earlier
Alive at the time
- René Descartes (aged 53)
- Rembrandt (aged 43)
- Louis XIV (aged 11)
- Isaac Newton (aged 6)
- Njinga of Ndongo and Matamba (aged 66)
- Shah Jahan (aged 57)
- Oliver Cromwell (aged 50)
- Charles I (aged 49)
- Tokugawa Iemitsu (aged 45)
- Aurangzeb (aged 31)