Hôtel de Ville, Lagny-sur-Marne

Lagny Abbey (St Peter’s Abbey, Lagny) was a monastery situated in the present-day commune of Lagny-sur-Marne in the department of Seine-et-Marne in France, in the eastern suburbs of Paris. It was founded in 644, refounded about 990 and after well over a millennium of existence (almost 1,150 years) was seized by the state at the French Revolution.

Lagny-sur-Marne (French pronunciation: [laɲi syʁ maʁn] , literally Lagny on Marne) is a commune in the eastern suburbs of Paris, France. It is located in the Seine-et-Marne department in the Île-de-France 26.1 km (16.2 mi) from the centre of Paris (20 minutes away from the centre of Paris). The commune of Lagny-sur-Marne is part of the Val de Bussy sector, one of the four sectors in the "new town" of Marne-la-Vallée.

The Lagny-Pomponne rail disaster occurred on 23 December 1933, between Pomponne and Lagny-sur-Marne (48°52′54″N 2°41′47″E), 20 kilometres (12 mi) east of Paris, when the 4-8-2 locomotive of the express for Strasbourg crashed at 110 km/h (65 mph) into the rear of an auxiliary train bound for Nancy, which was stopped on the railway. The impact crushed and splintered the last five cars of the Nancy train, older wooden cars pressed into service for the holidays. Both trains were full of people going home to their families for Christmas. 204 people died and 120 were injured. It is second to the worst railway disaster in French history, after the 1917 Saint-Michel-de-Maurienne derailment, and the deadliest ever in peacetime.

Thorigny-sur-Marne (French pronunciation: [tɔʁiɲi syʁ maʁn] , literally Thorigny on Marne) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.

The canton of Lagny-sur-Marne is a French administrative division, located in the arrondissement of Torcy, in the Seine-et-Marne département (Île-de-France région).

Pomponne (French pronunciation: [pɔ̃pɔn] ) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.

Saint-Thibault-des-Vignes (French pronunciation: [sɛ̃ tibo de viɲ] ) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.

Gouvernes (French pronunciation: [ɡuvɛʁn] ) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.

Guermantes (French pronunciation: [ɡɛʁmɑ̃t] ) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France. It is located in the Val de Bussy sector of Marne-la-Vallée. As of 2012, its population was 1,191. Writer Marcel Proust adopted its name for the origin of the Guermantes family in À la recherche du temps perdu. Proust Scholar Joshua Landy points out that the only reason Proust "used it in his novel is that no living members of the family remained.”

Carnetin (French pronunciation: [kaʁnətɛ̃] ) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.

Conches-sur-Gondoire (French pronunciation: [kɔ̃ːʃ syʁ ɡɔ̃dwaːʁ] ) is a commune on the Gondoire river in Brie, in the Seine-et-Marne department in the Île-de-France region in north-central France. It is roughly 13 miles (21 km) from Paris. Its remarkable sights include a monastery church of the 12th century, and a Second Empire castle. Until 1993, Conches-sur-Gondoire was simply called Conches. The name of the river was added to distinguish it from Conches-en-Ouche in Normandy (Eure county).

Château de Guermantes is a Château located in Guermantes, Seine-et-Marne, northern France. It is a listed monument since 1944.