The oldest existing painting is wall paintings drawn on the walls of caves (cave paintings) taking advantage of its concave-convex surface, and since humans started constructing buildings, paintings were being applied to their walls and became inseparable parts of the walls of living and divine space.
人類の最も古い絵画は、洞窟の凹凸を利用して描いた壁画（洞窟壁画）であり、人類が建物を作るようになって以後もその壁面に絵画が描かれるなど、絵画は居住空間や神聖な空間の壁と切り離せない存在だった。