The actual building is of the end of the XVIII century, it was built demolishing the preceding factory going back to the XVI century. Michelangelo, exponent of the illustrious family Salottolo, bought the palace in 1782 for 1800 ducals and proceeding contextually to its total restructuring that made to lose to the structure its original characteristics. The original plant of the Palace, in fact, was probably realized between 1500 and 1530 (date of the marriage between Isabella di Capua, princess of Molfetta and Ferrante I Gonzaga, count of Guastalla from 1539 and viceroy of Sicily in 1535 remembered by the noble coat of arms found inside the Palace).

The 'Trappeto Maratea' Museum is an extraordinary underground site of industrial archaeology in full activity since the Middle Ages in the heart of Vico del Gargano.