The Palazzo dei Priori in Viterbo is the symbolic monument of the city's civic power. Initially conceived as the residence of the Governor of the Heritage of San Pietro in Tuscia, it only became the seat of the Priors in 1510.

Currently, several areas of the Palace are accessible: the Palatine Chapel with the pictorial testimonies of Filippo Cavarozzi and Marzio Ganassini; the Madonna Hall, dedicated to the protector of the Diocese: the Madonna della Quercia; the Royal Hall with the frescoes of the castles that were under Viterbo's dominion on the ceiling and the late 16th-century frescoes by Baldassarre Croce; the Council Hall still used today for the meetings of the Municipality; the Landscapes Hall and the Aurora Hall. Beyond the noble floor of the Palace, you can visit the Museum of the Porticoes, a detached seat of the Civic Museum Luigi Rossi Danielli of Viterbo. Inside, it houses two works by Sebastiano Luciani, better known as Sebastiano del Piombo, the Flagellation (1525) and the Pietà (1512-1516).