Mirror, Late Zhou dynasty, 4th century BCE. Bronze, 22.23 cm (diameter). Gift of Louis W. Hill, Jr, 76.72.1 © Minneapolis Institute of Art

Mirror, Warring States period (475–221 BCE), 4th-3rd century BCE. Bronze. Dia.4-7/8 in.. The John R. Van Derlip Fund, 52.11.2 © Minneapolis Institute of Art

Mirror, Late Eastern Zhou - Early Qin dynasty, 3rd century BCE. Bronze, 16.67 × 0.79 cm, 0.3 kg. Bequest of Miss Alice O'Brien, 62.71.3 © Minneapolis Institute of Art