Skull Anatomy in "Saint Jerome in the Wilderness" by Leonardo da Vinci.

As a result of a detailed study of "Saint Jerome in the Wilderness", we found that Leonardo described the skull in this work in an original way. A portion of the skull's face is visible in St Jerome's chest and abdomen projection. This image shows the orbit, the frontal bone, the nasal aperture and the zygomatic process. In our opinion, Leonardo described the skull in the painting with his usual originality.