An Iron Age site in southern Zambia, occupies in the 14th-15th centuries AD by peoples who engaged in extensive trade in copper and gold. Elaborate graves contained metal bangles, ingots, iron hoes and gongs, bundles of copper wire, woven cotton cloth, marine gastropod shells, gold beads, and imported glass beads. This evidence for development of trade in the Zambezi Valley coincides in date with the decline of Great Zimbabwe.