Is "St. Charles Borromeo Giving Communion to the Plague-Stricken" in the public domain?

Yes, St. Charles Borromeo Giving Communion to the Plague-Stricken is in the public domain and available for free download under CC0 license.

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St. Charles Borromeo Giving Communion to the Plague-Stricken

This artwork was created 17th century.

Charles Le Brun, 17th century