Is "Antoine Dominique Sauveur Aubert (born 1817), the Artist's Uncle" in the public domain?

Yes, Antoine Dominique Sauveur Aubert (born 1817), the Artist's Uncle is in the public domain and available for free download under CC0 license.

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Antoine Dominique Sauveur Aubert (born 1817), the Artist's Uncle

Paul Cézanne, 1866