Notre-Dame de Boulogne is a Roman Catholic basilica located in Boulogne-sur-Mer, France. It was built in the 19th century and is dedicated to the Virgin Mary. The basilica is known for its impressive architecture, featuring a blend of Gothic and Byzantine styles, and is a prominent landmark in the region. The basilica houses a revered statue of the Virgin Mary, known as the "Our Lady of Boulogne," which has attracted pilgrims for centuries. The site also offers panoramic views of the surrounding area, making it a popular destination for both tourists and worshippers alike.