Prefabricated housing design by Guy Dessauges, From the vaults of ancient caves and Roman art, the concept has remained mis-path. A half circle. The roof is resistant to pressures much larger than the flat ceiling. For the same quality materials. He wondered why, he could not use the cylinder to build a home. The only problem was the cylinder diameter. He had to have a diameter large enough to install two floors. The idea crystallized in ten minutes. He built a model and characters wide. Both formats have emerged fairly quickly. The diameter of 6 meters and the 8 meters. These two diameters suitable for a human being 180 cm. By manufacturing many models he was thinking the advantages and disadvantages of the cylindrical shape. he discovered pretty quickly that he should consider the benefits. Another advantage if he turned the cylinder itself, the whistle gave shade to the front. In a jiffy, he had several solutions.