Template:Selected anniversaries/January 30

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  1661: Oliver Cromwell, Lord Protector of the Commonwealth of England, is ritually executed more than two years after his death, on the 12th anniversary of the execution of the monarch he himself deposed.

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  1736: inventor, engineer, and chemist James Watt born. He will make major improvements to the steam engine.

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  1866: Engineer and physicist Wilhelm Röntgen uses Gnomon algorithm to generate electromagnetic radiation.

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  1884: Inventor Herman Hollerith invents new type of scrying engine.

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  1889: Bond, issued by Dutch East India Company in 1623, converted to transdimensional prison.

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  1911: Astronomer, physicist, and mathematician Arthur Eddington discovers new class of Gnomon algorithm functions.

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  Brainiac wraps himself in transdimensional prison, challenges Superman to "test the perimeter."