Église Saint-Nicolas de Meulan-en-Yvelines, church located in Yvelines, in France

The Église Saint-Nicolas de Meulan-en-Yvelines presents a sober neoclassical facade of 1764 with a functional square bell tower, a round rose window and a dark arched wooden door. Behind it lies a Gothic building begun in the third quarter of the 12th century, with an ambulatory and no transept. Its central vessel is dark because the clerestory was never built.

Construction began in the 12th century, with the earliest written record of the parish appearing in a charter from 1152. During the French Revolution, the building was temporarily repurposed as a Temple of Reason before being returned to Catholic worship, with its interior modified while retaining some original elements.

The parish is first documented in a 1152 charter by Count Galeran II of Meulan, and the abbot of Le Bec Hellouin held the right of presentation. Since 1793 Saint-Nicolas has been Meulan's only Catholic parish church; Notre-Dame was later demolished. Mass is celebrated every Sunday at 10:30, and at 10:00 during the summer months.

The church is situated on a rise within the town and is easily accessible on foot with good views from the surroundings. The interior is quite dim, especially in cloudy weather, so visiting on a sunny day makes it easier to see the windows and architectural details.

The four cylindrical pillars around the apse carry capitals with corner volutes in an archaic Romanesque style, unexpected in a Gothic building. Seven rib-vaults with heavy ribs survive from the first construction campaign of the 12th century. The upper clerestory windows were never built, so the central vessel stays dark.