Assertion: coin's weight | /r/HasProperty | fixed at ​22 1⁄ 2 troy grains
Facets:
value: by offa of mercia
type: OTHER
Source sentences:
text: The weight of the English penny was fixed at ​22 1⁄ 2 troy grains (about 1.46 grams) by Offa of Mercia, an 8th-century contemporary of Charlemagne.