Who created "Portrait of Emma Hamilton"?

Portrait of Emma Hamilton was created by Angelica Kauffmann|Lady Emma Hamilton in 1791.

What medium is "Portrait of Emma Hamilton"?

Portrait of Emma Hamilton is Black and white chalk, on gray prepared paper.

Yes, Portrait of Emma Hamilton is in the public domain and available for free download under CC0 license.

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Angelica Kauffmann|Lady Emma Hamilton, 1791