Leonardo da Vinci's unfinished *Saint Jerome in the Wilderness* depicts the saint in a penitential pose. The painting showcases Leonardo's anatomical skill and use of chiaroscuro.

Leonardo da Vinci's unfinished painting, *Saint Jerome in the Wilderness*, offers a glimpse into the artist's working methods and his mastery of anatomy and chiaroscuro. Dating from Leonardo's first Milanese period (c. 1483-1499), the painting depicts Saint Jerome, a Christian theologian and translator of the Bible, in a penitential pose within a rocky, desolate setting. Jerome kneels, his gaze directed towards a crucifix (now lost) implied by his expression. His gaunt, muscular physique is rendered with meticulous detail, reflecting Leonardo's anatomical studies. The composition is characterised by a pyramidal arrangement, a hallmark of Renaissance art, with Jerome's figure forming the apex. The background features a hazy, atmospheric representing the wilderness, executed with subtle gradations of tone. At the base of the painting lies a lion, Jerome's traditional attribute, included because of the saint's legendary removal of a thorn from the animal's paw. The unfinished state of the work allows viewers to observe the underdrawing and preliminary layers of paint, providing insight into Leonardo's artistic process. The monochromatic palette, dominated by browns and ochres, adds to the painting's somber and contemplative mood.