Back in 344 BC, the Kalendae Iuniae, the Romans dedicated the temple of Juno Moneta on the Capitoline Hill. The site is now occupied by the neat (from the exterior) basilica church of Santa Maria in Arceli.
She was Juno “the warner” because of the legend — or even a verifiable story, since it had happened just forty years earlier — of the sacred geese giving the alert of the attack by the Gauls.
During the third century BC, Rome started issuing coins. The mint was set up in the temple of Juno Moneta. So, from that came the terms for “mint” and “money”.