Église Saint-Acceul d'Écouen, Gothic church in Écouen, France

Église Saint-Acceul is a church featuring a flamboyant Gothic choir, a simple nave without a transept, and an unfinished Renaissance bell tower. The interior is defined by numerous colored windows from the 16th century that showcase religious and noble scenes.

The present church was begun in 1535–1536, when Anne de Montmorency had a new flamboyant Gothic choir built; work stopped around 1554 for lack of money and because of the wars against the Huguenots. The nave was only completed in 1709 with support from Henri III Jules de Bourbon, Prince de Condé, and his wife Anna Henriette of Palatinate-Simmern. The west facade was added in 1852 by architect Pierre-Joseph Garrez, and the church was listed as a monument historique in 1840.

The stained glass windows depict Christ, the Virgin Mary, and members of the Montmorency family, reflecting how this church served as a religious and social center for both the community and the local nobility. These images made the connection between faith and power visible to those who worshipped here.

Access is normally available during opening hours, and visitors explore the interior best by moving slowly to appreciate the windows and architectural details. Guided tours are offered and help explain the building's special features and artwork.

The church keeps a relic of Saint Andeolus: a collarbone brought from Bourg-Saint-Andéol around 1700, held in a shrine of 1730. The statue of Saint Acceul above the main portal, carved in 1854, holds a saw, the instrument of the martyrdom attributed to Andeolus.