Fresco is a painting technique that involves applying pigment onto freshly laid wet plaster. This method, used since antiquity, ensures the colors are absorbed into the wall, making the artwork durable. Famous examples include Michelangelo's Sistine Chapel ceiling.

Fresco was commonly used in murals and ceilings, creating vibrant, long-lasting images. It requires precision and speed due to the quick drying of plaster, showcasing the artist's skill and planning.