Église Saint-Martin de Jouars-Pontchartrain
Church building · Jouars-Pontchartrain
Archaeological site
Diodurum is an important Gallo-Roman town in the city of Carnuts. It is located in the territory of the present commune of Jouars-Pontchartrain and Le Tremblay-sur-mauldre (Yvelines). It is considered the largest Gallo-Roman administrative and commercial site in Ile-de-France.