Experts have found a rare bronze bust depicting one of the most colourful characters in Roman history – the mad, sexually-depraved Emperor Caligula.Considered lost for nearly 200 years, the 5-inch-tall bust was originally excavated at Herculaneum, a Roman town destroyed by the eruption of Mount Vesuvius in AD 79...After a determined decade-long search, the bust has been found by Dr Silvia Davoli, curator of Strawberry Hill and historian at the University of Oxford...At some point in the 18th century, the bust was gifted to renowned English writer and politician Horace Walpole (1717-1797) by Sir Horace Mann, a distant relative who...