This palace on the Piazza dei Plebiscito was once known as the Palazzo Commune and is now housing city hall. We were limited in our time in Viterbo so didn't have time to enter and tour the palace but it contains some beautiful murals and frescoes.

Facing onto Piazza del Plebiscito is the Palazzo dei Priori, formerly known as the Palazzo del Comune. On the first morning of our visit we could not fully appreciate this building as there was a market in progress, the whole piazza was full of stalls and under the portico on the ground floor there were also stall holders. So we made our way out the back of the building into the courtyard, which was also busy. The courtyard/terrace was a great place to visit for the views over the valley and rooftops, view the pretty fountain and learn a little about the importance of Santa Rosa in Viterbo from the display on the wall.