George IV succeeded his father, George III, as King of the United Kingdom.
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Brunel's SS Great Britain ship was launched after taking four years to build.
The Seneca Falls Convention became the first-ever US women's rights convention.
The Great Fire of Rome started when the merchant shops around the Circus Maximus caught fire.
US President Ronald Reagan was made aware that the USSR was stealing US technology and research.
In Rosetta, Egypt, French troops discovered a black stone carved with two ancient Egyptian texts and one Ancient Greek text.
