1) Coin of ancient Rome 
Nummus (νουμμίον, noummion), plural nummi (νοῦμμοι) is a Latin term meaning `coin`, but used technically for a range of low-value copper coins issued by the Roman and Byzantine empires during Late Antiquity. ==History== In circa 294, during the Tetrarchy, a new large bronze coin of circa 10 grams weight and 30 mm diameter appeare.....