The history of mosaic goes back some 4,000 years or more, with the use of terracotta cones pushed point-first into a background to give decoration. By the eighth century BC, there were pebble pavements, using different coloured stones to create patterns, although these tended to be unstructured decoration. It was the Greeks, in the four centuries BC, who raised the pebble technique to an art form, with precise geometric patterns and detailed scenes of people and animals. By 200 BC, specially manufactured pieces ("tesserae") were being used to give extra detail and range of colour to the work. Using small tesserae, sometimes only a few millimetres in size, meant that mosaics could imitate paintings. Many of the mosaics preserved
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