Pages containing human figures and a horse, which accompany the precepts of Leonardo's Treatise on Painting taken from the editio princeps printed in Italian in 1651 in Paris (in the same year an edition in French will be released). This work saw the light thanks to a group of personalities linked by a great passion for art and a profound culture. First of all the Cavaliere Cassiano dal Pozzo, descendant of a noble Piedmontese family and personal secretary of Cardinal Francesco Barberini, known as the Cardinal Padrone. Cassiano used the iconographic part of his painter friend Nicolas Poussin, who created splendid drawings but with a graphic interpretation of Leonardo's artistic theory far removed from his original cartoons, and closer to the style of the time. The drawings of the diagrams that demonstrate scientific arguments will be drawn for the editio princeps by Pierfrancesco degli Alberti (1584-1638), former author of the maps of the underground Rome of the Bosio.
