Who created "Self-Portrait"?

Self-Portrait was created by Jean Etienne Liotard|Jean Etienne Liotard in ca. 1778–80.

When was "Self-Portrait" created?

This artwork was created ca. 1778–80.

Self-Portrait is Roulette, engraving, over mezzotint; proof before letters.

Yes, Self-Portrait is in the public domain and available for free download under CC0 license.

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Jean Etienne Liotard|Jean Etienne Liotard, ca. 1778–80