As a tree, the building once placed cannot move. Its roots, the foundations are proportionate to the size above. Botanical science teaches us that there are a lot of species; different in height, size and colour. They are used to living in places where habitats are different; other, coming from foreign countries get used to adapting to specials conditions. Buildings and plants can establish a special parallelism. Looking at one of my maple trees, on the late days of September, I realize the same values I had never noticed: the fallen leaves become a matt, contrasting its yellow colour against the green of the leaves still clinging on the branches.; the matt is a virtual image of the above. As days go on, leaves fall and the tree becomes a naked structure. It is said that mankind used to live in them.