Italian astronomer Giovanni Cassini discovered Iapetus, Saturn’s third-largest moon.
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St Katharine Docks opened in Central London, England, and it was one of the largest ports for trade in London in the 19th Century.
Susan Smith murdered her two children and tried to pin on a made-up Black man.
Taylor Swift's third studio album 'Speak Now' was released. It won Billboard's 2011 Album of the Year.
Benjamin O. Davis Sr. became the first African American US Army brigadier general.
John Hancock became the first Governor of Massachusetts after winning 90% of the votes in the Massachusetts Constitution.
