Clay or loam is the most ancient building material. Retracing his adventure in architecture means retracing the history of mankind. It is ground, that is a compound of clay and natural aggregates, simply left to air dry, without the need to cook it. The mixtures, with the addition of mineral binders or synthetic, become continuous coatings characterized by mechanical, abrasion and water resistance. The result is a healthy, pure and natural product, pleasant to touch. The colors are the result of the mixing of different clays from different territories.