English: Bagno del Papa in Viterbo: In circa 1454 Pope Nicholas V commissioned building a bath palace in Viterbo, and the construction at the Bagno del Papa was continued on through the reigns of several popes after Nicholas V. The Vatican accounts mention payments "for building done at the bath palace of Viterbo" during the reigns of Calixtus III, Paul II, and Sixtus IV. There also is evidence Pope Pius II was responsible for the addition of a western wing to the building.