Part of the Georgian National Museum, the Museum of Georgia houses Caucasian artefacts of archaeology and ethnography. A permanent exposition follows developments from the Bronze Age to the early 20th century. Gold was mined and worked here from a very early date - it was probably the origin of the "Golden Fleece" legend - so the area developed its own style, which influenced Achaemenid and Hellenistic jewellery. The most valuable exhibits include Homo ergaster fossils discovered at Dmanisi; the Akhalgori hoard of the 5th century BC; a collection of 80,000 coins chiefly of Georgian minting; medieval icons and goldsmith pieces collected from various sites in Georgia; and a lapidary with a rich collection of Urartian inscriptions. Nominally a separate Museum of Soviet Occupation, but simply the 4th floor of the same building, depicts Georgia's treatment at the hands of its neighbour, from 19th-century tsarist expansion through Soviet times to the conflict over Abkhazia and South Ossetia.