The area of modern Acquapendente was settled by Etruscans in Roman times, as archaeological finds have shown.[4] However, the first historical document of the modern city dates from the 9th century AD, with a town named Farisa or Arisa along the Via Francigena. A document from Emperor Otto I, dated 964, contains the first recorded use of the name Acquapendentem which means "hanging water", from several small waterfalls in the Paglia river on the boundary between Lazio and Tuscany.
Acquapendente was the first stop in Italy in the travels of Saint Roch in the early 14th century; the saint supposedly spent several days in the hospital there curing plague victims.[5]
After the complete destruction of Castro, Lazio in 1649, Acquapendente, previously part of the diocese of Orvieto, became the seat of a diocese that included what had been the diocese of Castro.[6][7][8] The diocese of Acquapendente continued in existence until 27 March 1986, when its territory was added to that of Viterbo.[9] No longer a residential bishopric, Aquipendium, as it is called in Latin, is today listed by the Catholic Church as a titular see.[10]
The castle of the frazione Trevinano known from the 12th century.
The Monte Rufeno Natural Reserve, 2 kilometres (1.2 mi) north of the city, at an elevation of 748 metres (2,454 ft). It has spectacular woods housing wildlife including, among others, wild boars, Eurasian eagle-owls, turtles and beech martens.
^Francesco Diedo, Vita Sancti Rochi (1478), translated by Irene Vaslef, in Irene Vaslef, "The Role of St. Roch as a Plague Saint: A Medieval Hagiographic Tradition" (PhD diss., Catholic University, 1984), 198.