Prieuré Saint-Côme de Luzarches

Prieuré Saint-Côme is a set of medieval priory ruins in Luzarches, a small town in the Val-d'Oise department, about 30 km north of Paris. The remains along rue Saint-Cosme date back to the 12th, 13th, and 15th centuries, and since 1940 they have been listed as a French historical monument (monument historique).

How did the priory come to be?

The site's origin is tied to a relic-bearing journey. In the late 12th century, Jean de Beaumont, lord of Luzarches, returned from the Holy Land with the relics of Saints Cosmas and Damian — the twin physician-martyrs venerated as patrons of medicine. In 1180 he founded a collegiate church on the hill in the upper part of town, dedicated to Saint Cosmas, and a religious community grew up around it over time. Those buildings — now in ruins — form the core of what is known today as Prieuré Saint-Côme.

The collegiate church served as a significant center of worship for centuries, until 1790, when it was deconsecrated during the French Revolution. After that, the dual dedication to Saints Cosmas and Damian passed to the town's lower church — today's Église Saint-Côme-Saint-Damien — which still carries that name.

What is there to see on site?

This is not a restored tourist attraction but a genuine set of ruins. Fragments of the chapel survive, and among the architectural details visitors can spot carved capitals and monumental fireplaces — evidence of the building's former scale and importance. The stonework spanning the 12th to 15th centuries reveals several distinct construction phases, typical of religious buildings expanded over the centuries.

The grounds are now private property, so in practice visits are limited to viewing from outside and from public vantage points around the town. Still, the sight of medieval walls set among the greenery of Luzarches is reason enough to include a stop here while exploring the historic town center.

How do you get to Luzarches?

Luzarches sits in the northern part of Val-d'Oise, under an hour's drive from central Paris via the N16 road or the A1 motorway (exit toward Chantilly/Senlis, then local roads). The town is also served by the Transilien H rail line from Paris Gare du Nord, with Luzarches as its terminus — making train travel a convenient car-free option. The priory stands on rue Saint-Cosme, in the upper, historic part of town, a few minutes' walk from the main square.

When is the best time to visit?

The ruins can be viewed year-round, but spring and early autumn are the best seasons for walking around Luzarches and its surrounding hills, when days are longer and the greenery around the walls is at its most striking. It's worth pairing the visit with a stop at the nearby Église Saint-Côme-Saint-Damien in the town center, which inherited the cult of the two saints after the collegiate church was deconsecrated.

Frequently asked questions

Can you go inside the ruins? The site is privately owned, so visits are largely limited to viewing from outside and from public spots around town.

Where does the name Saint-Côme come from? From Saint Cosmas (French: Côme), whose relics — together with those of Saint Damian — were brought to Luzarches by Jean de Beaumont after his journey to the Holy Land in the late 12th century.

What's the difference between the priory and the Église Saint-Côme-Saint-Damien in town? The priory is the ruined former collegiate church in the upper part of Luzarches, deconsecrated in 1790. The dedication to Saints Cosmas and Damian then passed to the still-active church in the lower part of town.

How old are the priory buildings? The oldest parts date to the 12th century, with further building phases in the 13th and 15th centuries, visible in the varied styles of the surviving fragments.