In the second decade of the fifteenth century, the book-hunter Poggio Bracciolini and two friends recognized Vitruvius’ De architectura among the moldy manuscripts at the monastic library at St. Gall in Switzerland. Although their find was not the first copy of De architectura to be identified, the reception of Vitruvius among Italian humanists tends to be afforded special attention in academic, public, and popular culture alike. Commonly shuffling at the center of that attention is L'Uomo Vitruviano of Leonardo da Vinci, usually dated to the 1490s. In Italian, and in his famous mirror writing, Leonardo mentions Vitruvius by name in the first word of his notes above his rendering of the homo bene figuratus and engages with the content of De architectura 3.1.2f. above and below it.