I've always loved Medieval illuminated manuscripts. The artists during that time produced work that was so imaginative, scatological, strange, grotesque, and vulgar. Below are some of my favorite images that I have been able to track down. Click the image to enlarge.
Here we have a bathing dragon lady, a blindfolded, multi-armed girl, a boneless man dancing to music, and cats doing people things.
Here we have a Centaur and Harpy, a dead King walking, a dog licking his balls, and hybrid dog-man with a human leg in his mouth.
Next we have bizarre fish-goat-man-lady creature, a Zitiron, or Sea-Knight, God planting a tree bearing people heads, and a man ripping his heart out (Happy Valentine's Day!)
Here we have some headless swordsmen, a hermaphrodite swimming in a fountain (most likely an alchemy illustration), a human being sawed in half, and a Knight freaking out over a UFO.
Now we have two illustrations of killer rabbits (there are lots of those for some reason), a King catching a dragon in bed with his wife, and a man with a club sneaking up on another couple in bed.
Here we have a Medieval Bigfoot, some men vomiting up frogs, and a couple of illustrations of Mermaids.
Here we have a woman picking fruit from a Penis Tree, a woman riding on a giant Penis Monster, an illustration of strange people from foreign lands (giant one foot guy, a dog-man, a two-headed child, a cyclops, and a face in the chest guy), and a man eating a baby.
Medieval artists seem fixated on asses and shitting for some reason. Here we have a monkey shitting on a plate, a man defending himself from a shitting bull, a man shitting next to a pig, and a monkey with an arrow in his ass.