Is "Alexandre Charles Emmanuel de Crussol-Florensac (1743–1815)" in the public domain?

Yes, Alexandre Charles Emmanuel de Crussol-Florensac (1743–1815) is in the public domain and available for free download under CC0 license.

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Alexandre Charles Emmanuel de Crussol-Florensac (1743–1815)

Elisabeth Louise Vigée Le Brun, 1787