Pietro Parenzo was a 12th-century Roman nobleman who served as the podestà of Orvieto. Appointed by Pope Innocent III to restore civil order during a period of intense religious and political division, he implemented a strict administration to stabilize the city. His efforts to maintain authority led to his assassination in May 1199 by members of the Cathar movement. Following his death, he was recognized as a martyr and a wonderworker, eventually becoming the patron saint of Orvieto.
Life and death
Born in Rome to a noble family, Parenzo arrived in Orvieto in early 1199. He sought to resolve local conflicts between Guelphs and Ghibellines, as well as the rising influence of Catharism. After consulting with the Pope, he returned to enforce strict laws. On 20 May 1199, Cathar adherents seized him in the mayoral palace. When he refused to rescind his decrees, they beat him to death.
Veneration
Following his burial in the Orvieto Cathedral, Parenzo gained a reputation for performing miracles. His tomb became a site for pilgrims traveling from Rome and other cities. While his local cultus grew for centuries, official papal recognition of his sainthood was not granted until 1879 by Pope Leo XIII. He is commemorated annually on 21 May.