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Conflans

Conflans-Sainte-Honorine: Barges, a Chapel Boat and a Museum of the Rivers

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Arriving in Conflans

River ships use passenger landing stages on the Seine near place Fouillère, on the right bank near the old town. Signposted footpaths lead from the riverside up through the old streets to the museum in the Prieuré park.

  • Conflans lies where the Oise flows into the Seine, about 25 km northwest of Paris, and has more than 36,000 inhabitants.
  • The two rivers meet at a point called the Pointil, at the southwest tip of the town.
  • Conflans-Sainte-Honorine station is on Transilien line J to Paris-Saint-Lazare, and Conflans-Fin-d'Oise station is also served by RER A.

Conflans on Your Own

The sights of Conflans sit on the slope between the Seine quays and the Prieuré park, so a walk up from the river covers most of them. A simple plan is the quays first, then the climb to the museum, the medieval tower and the church, and a rest in the Prieuré park before you head back down.

  • The quays: Working barges still stop at Conflans, and many of the boats moored along the quays are homes, a good number of them for retired bargemen. The chapel barge Je Sers is tied up on the Quai de la République.
  • The old town walk: A walking route through the old town, with a map in English as well as French, links the riverside, the Prieuré park and its museum, the Tour Montjoie and the church of Saint-Maclou.
  • The museum: The Musée de la batellerie et des voies navigables, in the Château du Prieuré at 3 place Jules-Gévelot, covers the history of boats and waterways in France. It opens in the afternoons from Tuesday to Sunday, and also in the mornings on Tuesday, Thursday, Saturday and Sunday. An adult ticket cost €5 in 2026, so check before you go.
  • A short boat ride: On weekends from May to October a free shuttle boat, the Conflanette, crosses to the ÃŽle de Devant, a wooded island with a 1.6 km nature trail. Only 40 people may be on the island at once, so places must be booked in advance through the local tourist office.
  • Getting back on time: All-aboard is usually about 30 minutes before sailing, and your ship posts the exact time. A ship will not wait for passengers touring on their own.
  • Carry ID: In France you must be able to prove your identity when asked, or within four hours at a police station, so carry your passport or another accepted ID.

Tipping in France

French law requires the cost of service to be included in restaurant prices, so a tip is not expected, and the currency is the euro. A tip is a thank-you if you were happy with the service.

  • By law, service is included in menu prices.
  • Most French people who do tip simply round the bill up to the next multiple of five euros.

A Town of Bargemen

Life on the water still shapes Conflans, from the chapel barge on the quay to the national bargemen's festival held every June. The town's monuments to the river trade stand close to where the Oise meets the Seine.

  • Je Sers: The chapel barge is a former coal barge of reinforced concrete, about 70 meters long, built in 1919. It was opened as a chapel on 11 November 1936, and its chapel is dedicated to Saint Nicholas, patron saint of bargemen.
  • The Pardon national de la batellerie: Usually held on the third weekend of June, this civic and religious festival was created to honor bargemen who died for France. During the weekend a flame relit at the Arc de Triomphe in Paris is carried down the Seine by boat, and a wreath is laid on the water at the confluence for those who lost their lives on the rivers.
  • The bargemen's war memorial: It stands at the Pointil, where the two rivers meet, and has been a listed historic monument since 2020.
  • A theater on the water: The Story Boat, a barge on the Quai de la République, is a theater for up to 112 people, with improvisation, music, children's shows and cabaret.

A Brief History

Conflans grew up where the Oise joins the Seine, around a saint's relics brought here in the 9th century and a priory that drew pilgrims for seven centuries. From the 1850s it became a town of bargemen, the place where barges formed convoys to be towed upriver to Paris.

  • Prehistory: People lived here in the Neolithic. A covered passage grave found in 1872 was moved to the national archaeology museum at Saint-Germain-en-Laye.
  • 876: Monks from Graville, near Le Havre, brought the relics of Saint Honorine to Conflans to keep them from the Norman raiders. The village was then protected by a wooden fort on the limestone spur above the Seine.
  • 1080: Monks from the abbey of Le Bec-Hellouin in Normandy founded a priory here to house the relics. It drew pilgrims for seven centuries, and a toll on boats passing along the Seine was one of the main sources of income for the priory and the lord of Conflans.
  • Late 11th century: The lords of Beaumont built a stone keep, the Tour Montjoie, which later passed to the Montmorency family. It has been a ruin since the late 15th century, and its four walls still stand about 15 meters high.
  • 1855: A chain was laid along the bed of the Seine between Paris and the confluence so that trains of barges could be hauled upriver. Bargemen had to stop at Conflans to form their convoys, and the town grew around the work this brought.
  • 1877 and 1892: Two railway stations opened, bringing Parisians out for holidays by the rivers and leading to new housing estates, especially at Chennevières.
  • 1940 and 1944: French army engineers blew up the town's bridges on 10 June 1940, and Allied bombing raids hit Conflans 15 times between May and August 1944.
  • 1967: The inland navigation museum opened in the Château du Prieuré, at the urging of the journalist Louise Weiss. The ministry recommended it be named a museum of national interest for inland shipping.
  • To learn more ashore: The Musée de la batellerie et des voies navigables, 3 place Jules-Gévelot, tells the story of French river shipping.

Conflans with Children

Boats are the attraction for children in Conflans, from the barges on the quays to the museum's model ships. The Prieuré park, with its play areas, gives everyone a break between sights.

  • Younger children: The Prieuré park covers 5 hectares, with several play areas and a paddling pool that opens in summer. It is open from early morning until the evening.
  • School age: The museum has a large collection of model boats and an activity booklet for younger visitors, and visitors under 18 paid €2 in 2026, so check before you go. Down at the Pointil, the warmer Seine and the muddier Oise do not mix; they flow side by side past the ÃŽle Nancy at Andrésy and for another 2 km before they blend.
  • Teenagers: The ÃŽle de Devant trail, reached by the free weekend shuttle boat from May to October, has information boards on the island's wildlife and a ruined former fuel office painted with a mural of bats, which now serves as a bat roost. Book places ahead through the tourist office.

Accessible Travel

The museum in the Château du Prieuré is fully accessible to visitors with reduced mobility, but the old town rises from the quays to a limestone plateau about 30 meters above the rivers. The nature trail on the Île de Devant is not accessible to wheelchairs or strollers.

  • The museum lends folding stools with a cane, and there is a hearing loop at reception. You can also phone ahead to arrange a visit that avoids guided groups.
  • The medieval cellar shown on the museum's extended guided tours is a vaulted, half-underground room that is not accessible to people with reduced mobility.
  • The walk from the Seine up to the museum climbs through the old streets, so ask your ship about a taxi if the slope is a problem.

Markets

Conflans has seven market mornings a week across three sites, on every day except Monday. The one closest to the river is the market on the quays.

  • Marché des quais: On place Fouillère, by the Seine, on Tuesday, Friday and Sunday mornings.
  • Marché de la Fonderie: A covered market at 1 place Auguste-Romagné, on Wednesday and Saturday mornings.
  • Marché de Chennevières: A covered market at 14 rue du Maréchal-Ney, on Thursday and Sunday mornings.
  • Market days can change around holidays, so check before you go.

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