Castel Nuovo, also known as Maschio Angioino, stands as a historic emblem of Naples, Italy. Erected by the order of Charles I of Anjou, this medieval and Renaissance castle has witnessed the city's evolution from its strategic position near the port. Visitors can explore the Palatine Chapel with its Renaissance portal and remnants of Giotto's frescoes, or delve into the Armory Room where Roman era remains are visible beneath a glass floor. The castle's rich history is further brought to life through innovative technology that allows smartphones to narrate the stories behind its walls.