This is 100 cotton men's t-shirt. DA VINCI VITRUVIAN ROCK MAN design by Headline Shirts. The discovery of a series of previously unknown drawings by Leonardo da Vinci have revealed that the famed artist/inventor/scientist was even more ahead of his time than anyone realized. The drawing titled "Vitruvian Rock Man" appears to be the crown jewel of the bunch. Da Vinci even had a series of t-shirts made to commemorate his guitar man, thus predating the "invention" of the t-shirt by some 450 years.