Han dynasty or later Including two mirrors each cast with a central animal-form boss surrounded by four mythical beasts cast in high relief within a circular rib decorated with grapevines, separating a recessed band decorated with birds; the third designed with two concentric bands of birds enclosing the center button, all framed by floral scrolls. 3 11/16 to 4 3/16in (9.4 to 10.7cm) diameter (3).