The Tower of London is home to some of the most well-known historic graffiti in the city, and many of the marks are located in the Beauchamp Tower. The Beauchamp Tower was built between 1275-1281 during the reign of King Edward I and was later used as a state prison, housing high-ranking prisoners including Lady Jane Grey and her husband, Guildford Dudley. This former prison contains over three-hundred graffiti inscriptions which were created over four centuries by the imprisoned inhabitants to help alleviate their boredom during their confinement and so that they could make sure that they would be remembered.