Oncia
In southern Italy, the oncia (plural "oncie" or "once") or onza (pl. "onze") was a unit of account during the Middle Ages and later a gold coin minted between 1732 and 1860. It was also minted in the southern Italian territories of the Spanish Empire, and a silver coin of the same value was minted by the Knights of Malta. The name is derived from the ancient Roman "uncia". It may sometimes be translated ounce. In the medieval kingdoms of Naples and Sicily, one "oncia" was equivalent to 30 "tarì", 600 "grani" and 3600 "denari" (pennies). Conventionally, a sum  of money is indicated by numbers of "oncie", "tarì", "grani" and "denari" separated by full stops, thus 2.2.15.1 indicates 2 "oncie", two "tarì", 15 "grani" and 1 "denaro". Although the "oncia" was never minted in the Middle Ages, it was the basic unit of account. The lesser denominations were minted, as was the ducat (six of which equalled an "oncia") and the "carlino" (60 to the "oncia"). Frederick II introduced the "augustalis", which was a quarter of an "oncia".