χαλκόπυλος

A. with gates of brass or bronze, ἱρόν Hdt. 1.181; χ. θεά, epith. of Athena, E. Tr. 1113 (lyr.); ὕδωρ, of Castalia, because issuing from bronze spouts in the shape of lions' heads, Pi. Pae. 6.7.