The image shows a seated man at a desk, writing with a quill in his right hand and resting his left hand on an open book. A radiant halo surrounds his head. He has a face with a serene expression, wearing a cap, and a robe with voluminous sleeves. In front of him is a winged ox on a tiled floor. Next to him is a decorative desk with intricate patterns. The background features a wall with a window looking out onto a pastoral scene, an image of a woman and child surrounded by clouds, and an ornamental tapestry partially visible to the left.