18th March 1990: 13 works of art stolen from Boston’s Isabella Stewart Gardner Museum in the world’s largest ever art theft

Despite a reward of $10 million, and extensive investigations by the FBI, none of the works have ever been recovered and nobody has ever been arrested for the robbery.

11th April 1950: Stone of Scone rediscovered 4 months after its disappearance

The Stone of Scone was found on the site of the High Altar at Arbroath Abbey, nearly four months after it disappeared from Westminster Abbey.