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Colomban of Luxeuil, also known as Saint Colomban, was an Irish monk who evangelized the rural populations of Gaul, Germany, Helvetia and Italy in the Middle Ages. In the life of Saint Colomban, written around 640, the monk Jonas of Bobbio indicates that Colomban and his companions were welcomed by the family of Authaire, an aristocrat at the court of Austrasia. The domus where this servant of Théodebert (or Thibert), king of Austrasia and friend of Colomban, resided, is said to be located in the commune of Ussy-sur-Marne. In the church, a 19th-century stained glass window reminds us of this meeting. The church is listed as a Historic Monument for its nave dating from the 11th and 12th centuries, as well as for the stained glass windows of its chapel of the Virgin dating from the 16th century.

A very beautiful section of road along the Clignon between Montigny-l'Allier and Gandelu

Nice perspective of the emblem of the former oil activity with its church.

Bridge overlooking the Marne near the Grand-Voyeux nature reserve.

This derrick, visible from the road, is one of the last active oil wells in the historic Coulommes deposit (see the must-see "Derrick de Coulommes"), which was the initiator of oil exploitation in Seine et Marne.

There is oil in France! In fact, 64 oil and gas deposits are currently in operation, mainly in the Aquitaine Basin and in the Paris Basin. Annual French production amounts to 0.8 million tonnes of oil, which represents 1% of the country's consumption. Production in Brie dates back to the 1950s, when France aimed for oil self-sufficiency and began a series of major research programs in Seine-et-Marne. The first oil discovery was made here on February 22, 1958, at a depth of 1,875 m in the basement of the village of Coulommes. This deposit has produced around two million tonnes of oil, but of the fifty-seven wells drilled since 1958 on the concession, only four are still active. This derrick was installed here by the municipality of Coulommes to commemorate this event. Following the fluctuations in the price of black gold, the oil companies plan to resume exploration and the re-exploitation of the deposits of Seine et Marne.

Accessible to everyone

Former stronghold of the Counts of Valois, the fortified castle was built around 1390 by Jean de Sépoix, advisor to King Charles V, on the site of an old fortified house. Currently only the square keep remains. The house was burned down during the Fronde.