The church has but one ancient chapel, dating from the 12th century, and situated to the left of the nave beneath the tower. The chapel has a period rib vault which rests on capitals in the form of acanthus leaves. Across from the old chapel, the first chapel on the right side of the nave contains a bas-relief in marble that depicts the baptism of Christ, which was recovered from the tomb of the mother of the King of Poland and Duke of Lorraine Stanislas Leszczynski, who died in Blois.