The image is an engraving depicting the upper half of a seated person identified as Gulielmus Lillius. He is facing slightly to the right, with a mustache, pointed beard, long wavy hair, and wearing a dark coat with a high collar, a white shirt, and a decorative brooch. His left hand rests on a globe, while his right hand holds a piece of paper with astrological symbols and a geometric chart. An open book with symbols is on the table in front of him. The background shows a pastoral scene with trees, a flock of sheep, a castle, and a figure with animals under a sky with astrological symbols partially covered by drapery framing the scene.