This is a medieval manuscript illustration depicting a dog attacking a green cloth, which appears to be covering something. The dog is a reddish-brown color, with a long snout and pointed ears. It's standing on its hind legs, with its front paws gripping the cloth. The cloth is being pulled away, revealing a long, dark weapon underneath, possibly a sword or lance. The background is a faded parchment color, with some red staining or decoration along the right edge. Above the image, there's text in a medieval script, likely Latin. The style is characteristic of illuminated manuscripts from the medieval period, with simple lines and flat colors.