A Late Shang bronze ritual vessel, a tetrapod weighing 1,925 pounds (875 kilograms), the largest metal-casting surviving from Chinese antiquity. Late Shang ritual vessels reveal high technological competence and large-scale, labor-intensive metal production. Said to have been found in the Anyang royal cemetery, the vessel is inscribed with a dedication to an empress and dates probably from the 12th century BC. It is now in the Historical Museum, Beijing.