Once all of the 280 artworks are known, create the item in Wikidata if it doesn't exist yet,
and tag all of them with:

[P608:Exhibition history -> Q20980830:Europeana 280 -> P17:Country]

in order than they can be seen in the dynamic Wikidata list, https://tools.wmflabs.org/listeria/dynamic.html?#list=53, the project homepage etc. etc.