The analysis of the Palladian drawings that he included in las editions of Daniele Barbaro's Vitruvius (1556 and 1567) and in his own treatise Quattro libri dell? Architettura (1570) allows us to understand the eloquent and precise way in which he translated into images the compositional, structural and constructive aspects that, as a professional architect, interested him. Thus, Palladio's architectural thought becomes accessible to us, precisely, through the reading of his drawings.