Mosaic art is a form of art that involves creating images or designs by assembling small pieces of colored glass, stone, or other materials. The small pieces used in mosaics are called tesserae, and they are usually flat and roughly square-shaped. Mosaics have a long history, dating back to ancient Mesopotamia in the 3rd millennium BC. They were used to decorate floors, walls, and ceilings of buildings, and were often used to depict mythological scenes. Today, mosaics are still a popular art form and are used in a variety of ways, including as fine art, sculpture, park benches, and public art. Antoni Gaudi is one of the most famous mosaic artists.