Mosaic is the art of creating images with an assemblage of small pieces of colored glass, stone, or other material. It may be a technique of decorative art, an aspect of interior decoration or of cultural and spiritual significance as in a cathedral. Small pieces, normally roughly cubic, of stone or glass of different colors, known as tesserae, (diminutive tessellae), are used to create a pattern or picture.

History of the Mosaic

thumb|left|Roman mosaic of Ulysses, from Carthage. Now in the Bardo Museum, Tunisia thumb|Roman mosaic with portrait of the poet Virgil, from Carthage. Now in the Bardo Museum, Tunisia

Mosaics of the 4th century BC are found in the Macedonian palace-city of Aegae and they enriched the floors of Hellenistic villas, and Roman dwellings from Britain to Dura-Europos. Splendid mosaic floors are found in Roman villas across north Africa, in places such as Carthage, and still may be seen in the extensive collection in Bardo Museum in Tunis, Tunisia. In Rome, Nero and his architects used mosaics to cover the surfaces of walls and ceilings in the Domus Aurea, built AD 64.

The mosaics of the Villa Romana del Casale near Piazza Armerina in Sicily are the largest collection of late Roman mosaics in situ in the world and are protected as a UNESCO World Heritage Site. The large villa rustica, which probably was owned by Emperor Maximian, was built largely in the early 4th century. The mosaics were covered and protected for 700 years, by a landslide that occurred in the 12th century. The most important pieces are the Circus Scene, the 64 m long Great Hunting Scene, the Little Hunt, the Labours of Hercules and the famous Bikini Girls, showing women in modern-looking bikinis. The peristyle, the imperial apartments and the thermae also were decorated with ornamental and mythological mosaics. Other important examples of Roman mosaic art in Sicily were unearthed on the Piazza Vittoria in Palermo where two houses were discovered. The most important scenes there depicted Orpheus, Alexander the Great's Hunt and the Four Seasons.

In 2000 archaeologists working in Leptis Magna, Libya uncovered a 30 ft length of five colorful mosaics created during the 1st or 2nd century. The mosaics show a warrior in combat with a deer, four young men wrestling a wild bull to the ground, and a gladiator resting in a state of fatigue, staring at his slain opponent. The mosaics decorated the walls of a cold plunge pool in a bath house within a Roman villa. The gladiator mosaic is noted by scholars as one of the finest examples of mosaic art ever seen — a "masterpiece comparable in quality with the Alexander Mosaic in Pompeii."