Extremely simple in its concept, the door is an essential element in interior design, a true furnishing accessory, capable of characterising spaces and environments. It allows one to enter and exit; it guarantees privacy and security but, at the same time, openness and the possibility of escape: an element, therefore, with an ambivalent, symbolic, dialectical meaning. Secondary and instrumental, in relation to the complexity of an architecture, but of extreme importance, changing perspective: it represents, in fact, the first contact with those who enter a house, a building, a room. And when the house is inhabited, the door becomes a large open window that reveals and narrates its interior.