About: http://webisa.webdatacommons.org/316177982

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Large pieces were difficult to form with the techniques available to early glassmakers, and the process itself was a secret guarded closely by artisans and royalty alike....
http://www.w3.org/ns/prov#wasQuotedFrom	blindschalet.com