Palazzetto Zuccari is an iconic 16th-century residence located in Rome, Italy. It was designed by famed artist Federico Zuccari and stands out for its elaborate Mannerist 16th-century facade on Via Gregoriana. The building's unorthodox doors and windows overlooking the street quickly earned it the nickname "House of Monsters". Today, it houses the renowned Bibliotheca Hertziana. With its intriguing history, Palazzetto Zuccari is a must-see destination for any traveler visiting Rome!