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).