Polychrome is the "'practice of decorating architectural elements, sculpture, etc., in a variety of colors." The term is used to refer to certain styles of architecture, pottery or sculpture in multiple colors.
Some very early polychrome pottery has been excavated on Minoan Crete such as at the Bronze Age site of Phaistos. In ancient Greece sculptures were painted in strong colors. The paint was frequently limited to parts depicting clothing, hair, and so on, with the skin left in the natural color of the stone. But it could cover sculptures in their totality. The painting of Greek sculpture should not merely be seen as an enhancement of their sculpted form but has the characteristics of a distinct style of art. For example, the pedimental sculptures from the Temple of Aphaia on Aegina have recently been demonstrated to have been painted with bold and elaborate patterns, depicting, amongst other details, patterned clothing. The polychrome of stone statues was paralleled by the use of materials to distinguish skin, clothing and other details in chryselephantine sculptures, and by the use of metals to depict lips, nipples, etc., on high-quality bronzes like the Riace bronzes.
An early example of polychrome decoration was found in the Parthenon atop the Acropolis of Athens. By the time European antiquarianism took off in the 18th century, however, the paint that had been on classical buildings had completely weathered off. Thus, the antiquarians' and architects' first impressions of these ruins were that classical beauty was expressed only through shape and composition, lacking in robust colors, and it was that impression which informed neoclassical architecture. However, some classicists such as Jacques Ignace Hittorff noticed traces of paint on classical architecture and this slowly came to be accepted. Such acceptance was later accelerated by observation of minute color traces by microscopic and other means, enabling less tentative reconstructions than Hittorff and his contemporaries had been able to produce. An example of classical Greek architectural polychrome may be seen in the full size replica of the Parthenon exhibited in Nashville, Tennessee, US.