caption: The image shows an open book with a drawing of a man on horseback, holding a flag, surrounded by people, trees, a building, and a sky. The book is believed to be from the 15th century, and the man on the horse is likely a knight, as indicated by the flag he is holding. The drawing is detailed and lifelike, with the man's facial features and clothing clearly visible. The trees and building in the background provide a sense of depth and perspective, while the sky is a deep blue.