Answer: Mosaic is a piece of art made up of small tiles or pieces of colored or painted stone to produce a painting that is usually placed on walls or ceilings. Mosaics have a long history, beginning in Mesopotamia in the 3rd millennium BC. Pebble mosaics were made in Tiryns in Mycenaean Greece. Mosaics with patterns and paintings became widespread in classical times, in Ancient Greece and in Ancient Rome. Early Christian basilicas from the 4th century onwards were decorated with wall and ceiling mosaics.
Fresco is a technique of mural painting made on fresh or wet lime plaster. Water is used as the vehicle to blend the dry powder pigment with the plaster; the painting becomes an integral part of the wall.
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