The Museum of the Treasure of San Gennaro is dedicated to the patron saint of Naples, San Gennaro. Located in the Cathedral of Naples, the museum houses a collection of precious religious artifacts, including gold and silver reliquaries, jewelry, and vestments. The highlight of the museum is the collection of the saint's blood, which is said to miraculously liquefy twice a year during special ceremonies. The museum offers visitors a glimpse into the rich religious history and traditions of Naples.