Rose of Viterbo, TOSF, was a young woman born in Viterbo, then a contested commune of the Papal States. She spent her brief life as a recluse, and was outspoken in her support of the papacy. Otherwise leading an unremarkable life, she later became known for her mystical gifts of prophecy and having miraculous powers. She is honoured as a saint by the Catholic Church.

Viterbo is a city and comune (municipality) in the Lazio region of Italy, the capital of the province of Viterbo.