Dan Brown released his fourth novel in the Da Vinci Code series, Inferno, which became an instant success.
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Delegates started to gather in Philadelphia to draw up the US constitution.
Edward Jenner, an English country doctor, gave the first vaccination against smallpox.
The USA's first space station, Skylab, was launched into Earth's orbit.
The Adventures of Robin Hood, directed by Michael Curtiz, William Keighley, and starring Errol Flynn and Olivia de Havilland, was released.
Loreen claimed victory for Sweden at the 67th Eurovision Song Contest with her song 'Tattoo.'
