Sparqling my way around the #europeana data, I think that we should add europeana entity IDs to wikidata (P7704). There are more than 4000 data providers in Europeana but only 108 organization IDs in Wikidata (91 of which I've just added myself as they are aggregated by @ddbkultur ).

Europeana Query: https://api.europeana.eu/console/sparql/#SELECT%20DISTINCT%20%3Fprovider%0AWHERE%20%7B%0A%20%20%3Faggregation%20edm%3AdataProvider%20%3Fprovider%20.%0A%7D (only useful for the number of results, times out if more conditions are added)
Wikidata Query: https://w.wiki/PQDE