Saint Ouen was built between the 11th and the 13th century. In the 15th century, expansion plans were cut short, due to lack of money, which explains the wooden arch of the nave (originally planned to be made from stone).
The thirteen chapels are lit by the stained glass windows from the 15th-16th centuries, which tell the life of the saints. Note that some stained glass windows were made by Max Ingrand in the 1960s, like the one of the Last Judgement above the 17th century organ.