Drawing in pen and ink on paper dating back to 1490 by Leonardo Da Vinci. In the centre a naked man. The face belongs to a middle-aged individual. The arms are represented in two positions, totally outstretched at shoulder height. They form a perfect horizontal line perpendicular to the body. The legs are also depicted in two positions, placed side by side with the right foot frontally represented and laterally the left foot. In the second position, the legs apart form an angle of about 30° with the line that coincides with the body's vertical. The feet rest on a circle whose centre is represented by the man's navel. Some horizontal lines separate the neck from the chest, pass through the nipples, above the pubis and below the knees. Vertical lines separate the arms from the trunk, pass through the inner elbow and the wrist.