<https://www.catawiki.com/a/251605-ancient-coin-auction-roman-byzantine>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/Thing>
<https://www.catawiki.com/l/30167965-roman-empire-denarius-hadrian-117-138-a-d-rome-mint-124-128-cos-iii-spes-to-left-silver>