ivory carving. Once completed, the statues required constant maintenance. It is known that at Olympia, skilled personnel were employed to ensure the upkeep of the statue. In the second century BC, the prominent sculptor Damophon of Messene was commissioned to make repairs on it. Due to the high value of some of the materials used and the perishable nature of others, most chryselephantine statues were destroyed during antiquity and the Middle Ages. For example, of the statue of Athena Parthenos, only the hole that held its central wooden support survives today in the floor of her temple. The appearance of the statue is nevertheless known from a number of miniature marble copies discovered in Athens, as well as from a detailed description by Pausanias. Pausanias also described Pheidias' statue of Zeus at Olympia. Here, some of the clay moulds for parts of Zeus's garments made of glass or glass-paste have been discovered in the building known as the "Workshop of Pheidias". They are the only finds directly associated with the great sculptor's most famous works and thus provide useful information on their creation. Few examples of chryselephantine sculpture have been found. The most prominent surviving examples are fragments of several smaller than life-sized burnt statues from the Archaic period, discovered at Delphi. It is not known whom they depict, although they are assumed to represent deities. Modern examples The term chryselephantine is also used for a style of sculpture fairly common in European 19th-century art, especially Art Nouveau. In this context, it describes statuettes with the skin represented in ivory and with clothing and other detail made of other materials, such as gold, bronze, marble, silver or onyx. For instance, the sculptor Pierre-Charles Simart produced a copy of the Athena Parthenos of Phidias for patron Honoré Théodoric d'Albert de Luynes, circa 1840, in ivory and gold, based on ancient descriptions. The result was somewhat disappointing: "it cost Luynes a hundred thousand francs to prove that Simart was not Phidias." Another version of this figure, by American sculptor Alan LeQuire, stands as the center of the Parthenon in Nashville, Tennessee. In the early 20th century, German sculptors Ferdinand Preiss and Franz Iffland became well known for their chryselephantine sculptures. A number of other European sculptors also produced chryselephantine pieces, including but not limited to Joé Descomps, Josef Lorenzl, Georges Omerth, Claire J. R. Colinet, Pierre Le Faguays, D. H. Chiparus, Bruno