caption: The image shows an open book with a drawing of a man's hand pointing at a blue circle, which is believed to be a representation of the sun, the moon, and the sea. The book is likely from a medieval manuscript, as indicated by the text on the page. The man in the drawing is wearing a long robe and a hat, and is holding a staff in one hand and a book in the other. The blue circle is surrounded by a halo of light, and there is a small island in the background. The sun is depicted in the center of the circle, with the waves of the ocean lapping against the shore.