Berlusconi's mansion in Sardinia is sold for 500 million. Villa Certosa, an architectural fantasy with an artificial volcano and a secret passage to the sea, has been the scene of great political pacts, but also of the parties and orgies organized by 'Il Cavaliere' The mansion has a 120-hectare park, a residential complex with 126 rooms, an amphitheater by the sea for 300 people, a nuclear shelter, an artificial navigable lake, tennis courts and all kinds of romantic details.