The list of 78 witnesses named by Mr Berlusconi includes Real Madrid footballer Cristiano Ronaldo, Hollywood star George Clooney and his girlfriend, and the Italian model and TV star Elisabetta Canalis.
When Ferdinand IV, King of Naples, fled advancing French troops in 1798 he took with him to Palermo some 20 works from the remarkable Farnese collection, his grandmother Elisabetta having been the last of the Farnese line.