San Nilo Festival

A patronal feast in the heart of the Castelli Romani

The San Nilo Festival is the signature event of Grottaferrata, a town in the Metropolitan City of Rome, Lazio, perched on the slopes of the Alban Hills. Every year on September 26th—a fixed date marking the anniversary of the saint's death—the community gathers to honor Saint Nilus of Rossano, a Calabrian monk of Greek language and rite who, in 1004, founded the monastery that gave birth to the city itself. He is not just a patron saint; Saint Nilus is, quite literally, the founder of Grottaferrata, and the festival tells his story through a rare blend of religious solemnity and local joy.

The Greek Abbey, the stage for the festival

The focal point of the celebrations is the Greek Abbey of San Nilus (or Exarchic Monastery of Saint Mary of Grottaferrata), the last remaining Italo-Greek monastery in Italy, where the Byzantine rite in Greek is still practiced today. During the festival, the basilica, the cloister, and the abbey moat become vibrant spaces: the Solemn Triduum with liturgical services, the pontifical Divine Liturgy, and sacred music concerts by the San Basilio il Grande Choir, the abbey's own ensemble dedicated to preserving the Byzantine repertoire.

The most anticipated moment of the devotional program is the solemn procession, which winds through Corso del Popolo, carrying the saint's relic and icon on a historic carriage, accompanied by a marching band and the local community. It is the image that best captures the spirit of the festival: an ancient rite traversing the main street of a modern town.

The popular side: markets, gastronomy, and music

Beyond its spiritual dimension, the San Nilo Festival has always had a festive and convivial character. The town center and Parco Traiano host an artisan market featuring agricultural products, handicrafts, and the culinary specialties of the Castelli Romani: local wines, cheeses, porchetta, and traditional sweets. Local associations—including the historic Ce steva 'na vota—manage dining areas and entertainment that keep the day lively from morning until late at night.

• Artisan and agricultural market at Parco Traiano, with entertainment by the Pro Loco
• Food area in the abbey moat, featuring traditional Castelli Romani cuisine
• Free evening concerts, ranging from sacred music to popular and operatic repertoires
• Final fireworks display at Piazzale San Nilo

Silent fireworks, a trendsetting choice

For several years, the Municipality has adopted a silent fireworks display, featuring reduced noise levels and musical accompaniment: a solution designed to protect pets and sensitive individuals without sacrificing the beauty of the pyrotechnics. This choice has become a hallmark of the festival and has brought attention to Grottaferrata far beyond the borders of the Castelli Romani.

Grottaferrata in September

The patronal feast is not an isolated event; it is part of a month-long series of initiatives known as Settembre grottaferratese, offered for free by the municipal administration in collaboration with the SCR Consortium and local associations. Culture, theater, historical re-enactments, and food events take place for weeks, culminating on September 26th.

Why it's worth the trip

Grottaferrata is about twenty kilometers from Rome and is one of the classic destinations in the Castelli Romani. Visiting for San Nilo means witnessing a Byzantine liturgy in a thousand-year-old monastery, strolling through the stalls of a fair rooted in medieval pilgrimages, and ending the day with an open-air concert and fireworks over the abbey. An authentic, free, and family-friendly festival in one of the most beautiful areas of Lazio.