This artefact was among wreckage retrieved from a shipwreck off the coast of the Greek island Antikythera in 1901.[10][11] In 1902, it was identified by archaeologist Valerios Stais[12] as containing a gear. The device, housed in the remains of a wooden-framed case of (uncertain) overall size 34 cm × 18 cm × 9 cm (13.4 in × 7.1 in × 3.5 in),[13][14] was found as one lump, later separated into three main fragments which are now divided into 82 separate fragments after conservation efforts. Four of these fragments contain gears, while inscriptions are found on many others.[13][14] The largest gear is about 13 cm (5 in) in diameter and originally had 223 teeth.[15] All these fragments of the mechanism are kept at the National Archaeological Museum, Athens, along with reconstructions and replicas,[16][17] to demonstrate how it may have looked and worked.[18]