At the top of the Spanish Steps in Rome, take a left underneath the imposing Catholic church. Down an unassuming side street, there"s a surprise waiting for you: a house of monsters. Welcome to the Palazzo Zuccari, a 16th-century palace where myths seem to come to life on its façade—grotesque faces swallow up its doors and windows. Federico Zuccari, who built the palace, was well-versed in monsters. His painting of the Last Judgement in Florence Cathedral and his illustrations of Dante"s Inferno are replete with mythical beings.