Four days of faith, tradition, and horses in the heart of the Simbruini Mountains
For the inhabitants of Trevi nel Lazio, the San Pietro Eremita Patronal Feast is the most important moment of the year, not only religiously but also socially and civically. It is a celebration that has been repeated for nearly a thousand years, every summer from August 28th to 31st. During those four days, the small mountain village in the province of Frosinone, home to about 1,700 people in the upper Aniene Valley, transforms: thousands of people arrive from neighboring towns, and many emigrated locals return home specifically for the feast. As the mayor likes to repeat, with San Pietro, the village becomes a city.
Pietro was born in Rocca di Botte, in Abruzzo, and after his formative years in Tivoli, he was tasked with preaching in the diocese. On August 9th, 1052, he left Subiaco and reached Trevi the following day by traveling up the Aniene Valley. During his twenty-day stay in the village, he performed several miracles before passing away on August 30th of that same year. His bones still rest today in the crypt of the Church of Santa Maria Assunta, and in 1215, Pope Innocent III proclaimed him a saint. Since then, the bond between Trevi nel Lazio and Rocca di Botte, on opposite sides of the Simbruini Mountains, has never been broken: every year, the Abruzzese 'compari' cross the mountain, many still on horseback, to honor their shared saint together.
The feast opens on August 28th with the enthronement: the bust of San Pietro Eremita is brought out of the church and presented to the population, officially starting the festivities. On August 29th, Trevi welcomes the 'compari' from Rocca di Botte for the grand procession, the most heartfelt and well-attended event: the silver bust of the saint, commissioned in 1627, is paraded through the streets of the village. August 30th, the anniversary of the saint's death, is the main day of the patronal feast, while August 31st, the closing day, combines the traditional fair with the highly anticipated Palio.
The San Pietro Eremita Palio, a lost tradition brought back to life in recent years, is the highlight of the summer festivities. Along the main avenue of the village, Viale Cesare Battisti, the eight city districts—Civita, Rivo, Cunicella, Suria, Santo Nicola, Borgo Madonna, Piajo, and Cinarzo—compete on horseback. The format is a direct knockout: four one-on-one heats, followed by semifinals and a final, until the coveted banner is awarded to the winning district. It is a tournament that blends tradition, excitement, and a sense of belonging, attracting Palio enthusiasts from all over Lazio.
On the evening of August 31st, the feast concludes with one of its most curious rituals: at midnight, the 'Signora San Pietro' is paraded—a large puppet accompanied by music and songs—before the final bonfire that bids farewell to the patron saint until the following summer. It is the moment when the sacred and the profane intertwine, according to a custom widespread in the popular festivals of southern Lazio.
Supported by the Municipality of Trevi nel Lazio and the Palio Committee, the feast is also an opportunity to discover one of the most beautiful villages in the Ciociaria region, awarded the 'Orange Flag' by the Italian Touring Club and nestled in the Simbruini Mountains Regional Natural Park, the largest protected area in the Lazio region. Between the Caetani castle, the medieval streets, and the forests of the upper Aniene Valley, the trip for San Pietro is well worth the discovery.
The 2026 edition of the patronal feast follows the usual calendar, from August 28th to 31st. It begins on Friday the 28th with the enthronement of the saint's bust, which officially opens the festivities; on Saturday the 29th, the village welcomes the 'compari' from Rocca di Botte and hosts its most solemn procession, with the 1627 silver bust carried through the streets of the village; Sunday the 30th is the main day of the feast, when Trevi nel Lazio turns from a small village into a city, welcoming thousands of visitors.
Grand finale on Monday, August 31st, 2026: after the fair, at 3:00 PM, the San Pietro Eremita Palio kicks off along Viale Cesare Battisti. The eight districts—Civita, Rivo, Cunicella, Suria, Santo Nicola, Borgo Madonna, Piajo, and Cinarzo—compete on horseback in knockout heats until the final that awards the banner. At midnight, the feast closes with the traditional 'Signora San Pietro', the puppet accompanied by music and songs before the final bonfire.
Trevi nel Lazio can be reached by car from Rome via the A1 motorway (Anagni-Fiuggi exit), continuing towards Fiuggi and the SR411, or from Subiaco along the Aniene Valley. COTRAL bus connections are available from Frosinone and Fiuggi. The Palio is held along Viale Cesare Battisti, in the town center.
All events of the patronal feast, including the Palio, are free to attend.
Municipality of Trevi nel Lazio: +39 0775 527001. Palio Committee: [email protected], +39 366 5465612.
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Centro storico e Viale Cesare Battisti
Viale Cesare Battisti, 03010 Trevi nel Lazio