Whether you've studied art history or not, you're probably familiar with the world's most famous fresco: Michelangelo's paintings on the walls and ceiling of the Sistine Chapel in Rome.
To paint a fresco, you must apply paint to still wet plaster, and you better get it right the first time. Too slow and the plaster hardens, and then you've got a lot of chipping away to do. Fresco comes from the Italian fresco, meaning "cool" or "fresh," which describes exactly the fast, unlabored technique required of fresco painting.