Santiago found Leonardo’s pentagon structure whose circles on which the pentagon is supported obey a geometric progression which correspond to the orbits of planets of the solar system. Santiago deduced the mathematical expression of that and the stereo perspective which he called the “Mathematics Philosophy in Leonardo’s work”. Thus “Santiago’s Leonardo” contributed with many other published works by many authors of different countries, to unveil the mysteries which involve the life of this great genius of the Renaissance period. Besides Santiago’s discoveries allowed him to transfer to his own canvas this cosmic harmony.