The Diocesan Museum of Velletri, known as the Ovelletri Muse, is nestled within the charming region of Castelli Romani, specifically in the town of Velletri. This museum is situated in the cloister of the Cathedral, adding to its historical and spiritual significance. It houses an exceptional collection of priceless art, known for its rarity and unique historical importance. One of the museum’s most valuable treasures is the "Croce Veliterna," a remarkable 11th-12th century reliquary adorned with intricate filigree gold and enamels. Additionally, the museum showcases works by renowned artists such as Gentile da Fabriano, Bicci di Lorenzo, Antoniazzo Romano, and others, along with extraordinary vestments and liturgical objects.