coordinate with Wikidata:WikiProject sum of all paintings
The WikiProject sum of all paintings is a effort to get an item for every notable painting in WikiData. What's the purpose of this? Consider these questions: How many painting did Picasso create? Where are they located? Who owns them?
Wikidata is an open data Wikimedia project. Wikidata items are licensed under CC0 (a public domain-like license). Data can therefore be pulled from Wikidata without attribution. Google has been doing this for a while. Wikipedia & other Wikimedia projects have templates & modules that pull data as well.
"into Wikidata" rather than "in Wikidata"