It was reserved for the Byzantine school to break away more decidedly from the natural presentment of things and to develop artistic conventions. Yet in the best early examples of this school the classical sentiment still lingers, as the relics of the miniatures of the Cotton Genesis, and the best of the miniatures of the Vienna Dioscurides testify; and in the miniatures of the later Byzantine manuscripts, which were copied from earlier examples, the reproduction of the models is faithful. But on comparing the miniatures of the Byzantine school generally with their classical predecessors, one has a sense of having passed from the open air into the cloister. Under the restraint of ecclesiastical domination Byzantine art became more and more stereotyped and conventional. The tendency grows to paint the flesh-tints in swarthy hues, to elongate and emaciate the limbs, and to stiffen the gait. Browns, blue-greys and neutral tints are in favor. Here we first find the technical treatment of flesh-painting which afterwards became the special practice of Italian miniaturists, namely the laying on of the actual flesh-tints over a ground of olive, green or other dark hue. Landscape, such as it was, soon became quite conventional, setting the example for that remarkable absence of the true representation of nature which is such a striking attribute of the miniatures of the Middle Ages.