Art Institute of ChicagoPublic domain
Model of a Counterweight (Quan or Huanzhen)
Unattributed · Eastern Zhou dynasty, Warring States period (480–221 B.C.), 4th/3rd century B.C.
Research assistant
Unattributed · Eastern Zhou dynasty, Warring States period (480–221 B.C.), 4th/3rd century B.C.
Research assistant