Fontana di Piazza del Gesù, Viterbo

San Silvestro is a Romanesque-style, Roman Catholic parish church located at the intersection of Via dei Pellegrini #23 with Piazza del Gesu, in Viterbo, region of Lazio, Italy. It is also known as Chiesa del Gesù, since it was previously administered by the Jesuits. The church is infamous for being the site of the murder of Henry of Almain (son of Richard, Earl of Cornwall) by his cousins Simon and Guy de Montfort: a murder occurring during a mass in 1271 attended by cardinals and kings.

Santa Maria Nuova is an Romanesque-style, Roman Catholic church located on Via Baciadonne and the piazza of the same name in the historic center of Viterbo in the Region of Lazio, Italy.

The Fontana di San Tommaso, also known as Fontana della Morte is a medieval fountain located in a piazza located in Piazza della Morte, at the intersection of Via San Lorenzo and Via Pietra del Pesce on the western edge of historic Viterbo, region of Lazio, Italy. It stands a block east of the Palazzo Farnese, and located a block south of the church of San Silvestro.

San Giovanni Battista del Gonfalone (St John the Baptist of the Banner) is a Baroque architecture, Roman Catholic oratory (chapel or small church for a confraternity) located on #11 Via Cardinal La Fontaine in Viterbo, region of Lazio, Italy.

The Palazzo dei Priori is a 13th-century civic palace located in Piazza del Plebiscito in central Viterbo, region of Lazio, Italy. Known in the past also as the Palazzo della Commune or Comunale, it now houses both municipal offices and the Museo dei Portici, which houses the famous altarpieces by Sebastiano del Piombo, depicting a Pietà and a Flagellation. The Palace is connected and accessible through an arch over Via Filippo Ascenzi to the former Palazzo del Governatore or Palazzo del Podesta, behind which rises a tall medieval clock tower. Its largest bell deriving from the church of Santa Maria della Verita. Across the piazza on the north end of the Palazzo dei Priori is the church of Sant'Angelo in Spatha, which has a marble replica of the Ancient Roman Sarcophagus of Bella Galiana on the facade. To the left of the palace, facing the piazza is the baroque Palazzo della Prefettura.

Santa Maria della Salute is a small Gothic-style, deconsecrated Roman Catholic church located on Via della Pescheria in Viterbo, region of Lazio, Italy. Today the church is often used as an exhibition hall and for cultural events.

The Palazzo del Podesta, also known as Palazzo del Governatore, is a 13th-century civic palace located in Piazza del Plebiscito in central Viterbo, region of Lazio, Italy. It is attached and mainly accessible through the arch over Via Filippo Ascenzi connecting it to the larger Palazzo della Commune or Comunale. This palace has a tall stone bell-tower (Torre del Orologio formerly Torre dei Monaldeschi) rising behind it; the tower at about its midpoint has a clock, first added in the 15th-century. The largest bell in the tower derives from the church of Santa Maria della Verita. Diagonally across the piazza is the church of Sant'Angelo in Spatha, which has a marble replica of the Ancient Roman Sarcophagus of Bella Galiana on the facade.

The Palazzo degli Alessandri is a 13th-century palace located in Piazza San Pellegrino number 50 in central Viterbo, region of Lazio, Italy. Across from this Piazza, rises the small Gothic church of San Pellegrino.

San Pellegrino is a reconstructed Gothic-style, Roman Catholic church located in the piazza of the same name in central Viterbo, region of Lazio, Italy. The church stands across from the medieval Palazzo degli Alessandri.

Palace of the Popes in Viterbo (Italian: Palazzo dei Papi) is a palace in Viterbo, region of Lazio, Italy. It is considered to be one of the most important monuments in the city, situated alongside the Duomo di Viterbo (Viterbo Cathedral). The Papal Curia was moved to Viterbo in 1257 by Alexander IV, due to the hostility of the Roman commune and constant urban violence: the former bishop's palace of Viterbo was enlarged to provide the Popes with an adequate residence. The construction, commissioned by the Capitano del popolo ("Captain of the People") Raniero Gatti, provided a great audience hall communicating with a loggia raised on a barrel vault above the city street. It was completed probably around 1266. The massive façade, facing the central piazza San Lorenzo which is dominated by the Duomo, is approached by a wide staircase completed in 1267. The top of the palace walls is decorated with square merlons. On the right is a wide roofless loggia with a seven-bay arcade, supported by slender doubled columns and decorated with crests and reliefs. Within the loggia is a 15th-century fountain, made with material of various ages, sporting the coat of arms of the Gatti family. Viterbo remained the residence of the papacy for twenty-four years, from 1257 to 1281. After Alexander IV, the palace was the residence of Urban IV, then housed the papal election of 1268–1271 which elected Gregory X (the longest papal election in Church history, which ended after the palace's roof was removed), the residence of John XXI (who died in the building in 1277 when his study collapsed), and the residence again of Nicholas III and Martin IV, who moved almost immediately to Orvieto in 1281. They were all elected in the most famous hall of the palace, the Sala del Conclave so called because it was home to the first and longest conclave in history. In c. 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.

The province of Viterbo (Italian: provincia di Viterbo) is a province in the Lazio region of Italy. Its capital is the city of Viterbo.

The siege of Viterbo was fought in 1243 between the Holy Roman Emperor Frederick II and the rebellious city of Viterbo, 50 km north of Rome.