Église Notre-Dame-de-l'Assomption, Medieval church in Labastide-d'Armagnac, France.

Église Notre-Dame-de-l'Assomption stands at the southeast corner of the Place Royale, where its tower breaks the line of arcades. The flat chevet, about sixteen metres wide, is built of medium-sized stone and braced by two corner buttresses and a central one; three windows pierce the wall. The bell tower-porch of the early 15th century has a lower level ringed by a stone bench, and its side windows were cut in 1820.

Founded in the 14th–15th centuries, the church began as a simple rectangular hall, as was usual in the region's bastides. Its bell tower was built against the facade in the early 15th century, and in the 16th century the roof was raised and the first two bays from the choir were vaulted. The parish, first dedicated to Saint John the Baptist, was placed under Notre-Dame de l'Assomption in 1638 after the vow of Louis XIII. The present vaulting was only completed in 1880.

The choir displays a wall painting made by the artist Seroni in 1831 using natural pigments fixed with glue, reflecting how local artists decorated religious spaces during that time. When you walk through this part, you experience the trompe-l'oeil effect, which shows how the church was designed to capture people's attention and admiration.

The tower stands at the southeast corner of the Place Royale, where it breaks the line of arcades around the square. The lower level forms a porch ringed by a stone bench, sheltering the portal; the baptismal font is just inside, to the left of the entrance. The church also hosts concerts and similar events, drawing on its acoustics.

The bell tower was added in the early 15th century and included arrow slits and a defensive gate, showing how the church served to protect the town. This military design feature reveals that the building had duties beyond religious worship during that time.