1) Medieval currency 
The ceiniog (denarius; penny; plural: ceiniogau) was the basic currency of the medieval Welsh kingdoms such as Gwynedd and Deheubarth. Hywel Dda was the only ruler recorded as minting his own proper coins; however, the ceiniog was not a coin but a value of silver. The `legal penny` (denarius legalis; ceiniog cyfreith) was the weight of 32 wheat .....