 The mother house of the order, Cîteaux, had developed the most advanced style of painting in France, at least in illuminated manuscripts, during the first decades of the 12th century, playing an important part in the development of the image of the Tree of Jesse.However, as Bernard of Clairvaux, who had a personal violent hostility to imagery, increased in influence in the order, painting and decoration gradually diminished in Cistercian manuscripts, and they were finally banned altogether in the order, probably from the revised rules approved in 1154.Any wall paintings that may have existed were presumably destroyed.