The acrolith was another composite form, this time a cost-saving one with a wooden body. A xoanon was a primitive and symbolic wooden image, perhaps comparable to the Hindu lingam; many of these were retained and revered for their antiquity. Many of the Greek statues well-known from Roman marble copies were originally temple cult images, which in some cases, such as the Apollo Barberini, can be credibly identified. A very few actual originals survive, for example the bronze Piraeus Athena (2.35 metres high, including a helmet).