In a bygone era of political intrigue and threat of assassination, the Doge of Genoa lived in a fortified palace rumored to contain enough stored food and water to keep him alive two full years with the doors sealed. Needing to travel via secret corridor to the Cathedral of San Lorenzo, he would arrive in his private church quarters just as mass began. While today this part of the church is normally closed to the public, with special reservations you can tour his chambers, and from there climb to the bell tower for spectacular views of the entire ancient city.