Palazzo dell'Arengo is a monumental palace located on Piazza Arringo, also called Piazza dell'Arengo (Square of the People's Assembly), in the town-center of Ascoli Piceno, Marche, central Italy. The facades of the Duomo of Ascoli Piceno, the Baptistry of San Giovanni Battista, and the Episcopal palace also face the square, which is now decorated with two oval fountains.