Église Notre-Dame de Bar-le-Duc, Romanesque church in Bar-le-Duc, France.

Église Notre-Dame de Bar-le-Duc is a Romanesque church built with rounded arches and thick stone walls that create a sturdy structure. Stained glass windows filter light into the interior, casting colored reflections across the stone surfaces.

Countess Sophie of Bar founded a Benedictine priory on the site of an earlier Marian sanctuary in 1088. The church was built in the 11th and 12th centuries in the Romanesque style, following the plan of Saint-Mihiel Abbey. In 1383 Duke Robert I rebuilt the nave, and the south tower was crowned with a 41-metre lead spire. A lightning strike on 14 March 1619 destroyed the spire and melted six bells; the tower was later demolished and replaced by the present porch tower, completed in 1743–1744. The church has been a classified historical monument since 19 February 1981.

The parish was run by Benedictine monks of the priory founded in 1088, with the prior named curé by a charter of Pibon, bishop of Toul. In 1793 the church became a Temple of Reason and hosted civic and patriotic festivals. The high-relief of the Assumption above the portal was commissioned from sculptor Louis Humbert on 21 September 1751.

The church stands in the Notre-Dame district of the lower town, on the right bank of the Ornain, aligned with the rue Bar-la-Ville; the main entry is through the 18th-century tower-porch on that axis. The quarter is the oldest in Bar-le-Duc, laid out along the former Reims-Metz Roman road, now the rue des Romains. The building is a classified monument and can be visited outside worship.

The south tower once carried a lead-covered spire 135 feet (about 41 m) tall, the highest point in the town. Lightning struck it on 14 March 1619, melting the six bells; the spire was never rebuilt and the tower was later demolished in 1725. The present bell tower, begun in 1728, was cut to a single bell storey and finished in 1743-1744.