What nature offers to an often unwitting observation, or to an appreciation of a solely aesthetic type, is here picked out, considered and classified as possible construction material. Pebbles from a beach, twigs, leaves, straw or sand are presented in the form of identical pictures in a catalogue, as if to suggest their use in constructions that draw their inspiration from the setting in which they will be located. Here, therefore the eye of the artist and that of the architect are simultaneously present, so that they can be stimulus and guide for each other.