Among the many senses that modern painters have lost, we must number the sense of architecture. The edifice accompanying the human figure, whether alone or in a group, whether in a scene from life or in an historical drama, was a great concern of the ancients. They applied themselves to it with loving and severe spirit, studying and perfecting the laws of perspective. A landscape enclosed in the arch of a portico or in the square or rectangle of a window acquires a greater metaphysical value, because it is solidified and isolated from the surrounding space. Architecture completes nature.