Circular Mirror with Decoration of "TLV" Pattern and Animals of the Four Quadrants

The move of the Zhou capital eastward in the wake of nomadic invasions marked a diminution of Zhou authority and the rise in power of surrounding states. Although in the earlier Western Zhou period, bronze was employed primarily for ritual vessels, weapons, and tools, during the Eastern Zhou era, it began to be used to make mirrors, bells, and chariot fittings as well. Bronze mirrors were polished smooth on their reflective sides, and their backs were intricately decorated with auspicious symbols or cosmological designs. Their reflectivity was believed to create light in a darkened tomb and to ward off evil. Chariots were vital for military warfare, and those of the powerful were fitted with ornate finials and attachments, which during the Warring States period (475–221 BCE) were often inlaid with precious stones and metals. This technique was also employed with greater frequency in the casting of bronze vessels, revealing yet another shift in the function of such objects, from commemorative status symbols to more decorative vestiges of a ritual tradition.