Notre-Dame-de-Victoire, Lorient, Catholic parish church in central Lorient, France.

Notre-Dame-de-Victoire is a concrete church in central Lorient, completed in 1955 to Jean-Baptiste Hourlier's design. Its flat bell tower rises 54 metres, the highest point in the city, with a clock face and rows of small square openings down the shaft. Beside it stands the round nave under a 24-metre dome on short pillars, entered through a white porch 12 metres high.

After Saint Louis Church was destroyed in 1943 during World War II, architect Jean-Baptiste Hourlier designed this replacement, completed in 1955. The new building represented Lorient's reconstruction following wartime devastation.

The name refers to the 1746 British siege of the city. In the Saint-Louis chapel, a Notre-Dame-de-Victoire statue carved by Postel in 1850 survived the Second World War; believers consider its story miraculous, and in 2021 the Bishop of Vannes made the chapel a diocesan Marian sanctuary. The church also hosts the Orthodox parish of Saint Xenia of Saint Petersburg.

Visitors can climb 270 steps to reach the bell tower's top, the highest point in the city with sweeping views. The ascent requires physical effort but provides a reward of seeing Lorient from above.

The dome's ceiling features a star pattern with varied textures created by specific concrete forming techniques. These casting details reveal the craftsmanship invested in the building's modern design.