Park. The Menagerie buildings were removed in 1852 but the Keeper of the Royal Menagerie was entitled to use the Lion Tower as a house for life. Consequently, even though the animals had long since left the building, the tower was not demolished until the death of Copps, the last keeper, in 1853. In 1999, physical evidence of lion cages was found, one being 2x3 metres (6.5x10 feet) in size, very small for a lion that can grow to be 2.5 meters (approximately 8 feet) long. In 2008, the skulls of two male Barbary lions (now extinct in the wild) from northwest Africa were found in the moat area of the Tower. Radiocarbon tests dated them from 1280 to 1385 and 1420–1480. In 2011, an exhibition was hosted at the Tower with fine wire sculptures by Kendra Haste. In folklore The Tower of London has been represented in popular culture in many ways. As a result of 16th and 19th century writers, the Tower has a reputation as a grim fortress, a place of torture and execution. One of the earliest traditions associated with the Tower was that it was built by Julius Caesar; the story was popular amongst writers and antiquaries. The earliest recorded attribution of the Tower to the Roman ruler dates to the mid-14th century in a poem by Sir Thomas Gray. The origin of the myth is uncertain, although it may be related to the fact that the Tower was built in the corner of London's Roman walls. Another possibility is that someone misread a passage from Gervase of Tilbury in which he says Caesar built a tower at Odnea in France. Gervase wrote Odnea as Dodres, which is close to the French for London, Londres. Today, the story survives in William Shakespeare's Richard II and Richard III, and as late as the 18th century some still regarded the Tower as built by Caesar. Anne Boleyn was beheaded in 1536 for treason against Henry VIII; her ghost supposedly haunts the Church of St Peter ad Vincula in the Tower, where she is buried, and has been said to walk around the White Tower carrying her head under her arm. This haunting is commemorated in the 1934 comic song "With Her Head Tucked Underneath Her Arm". Other reported ghosts include Henry VI, Lady Jane Grey, Margaret Pole, and the Princes in the Tower. In January 1816, a