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unknown - Public Domain
Eric Koch / Anefo - CC BY-SA 3.0
RUPCHRI - CC BY-SA 4.0
U.S. House of Representatives - Public Domain
GhostPirate -
Notman Photography, Boston - Public Domain
Édouard Vuillard - Public Domain
unknown photographer - Public Domain
Contemporary portrait - Public Domain
DMS (ca. 1776-1890) <br/> - Public Domain
Louise Palanker - CC BY-SA 2.0
MiamiFilmFestival - CC BY-SA 2.0
William J. Meuer Photoart Collection - Public Domain
anonymous - Public Domain
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Crébillon, Claude-Prosper Jolyot de, 1707-1777
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unknown - Public Domain
Eulenburg, Albert, 1840-1917
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Ørsted, Hans-Christian, 1777-1851
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Haynes, Elwood, 1857-1925
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Eric Koch / Anefo - CC BY-SA 3.0
Bladen, Ronald, 1918-1988
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RUPCHRI - CC BY-SA 4.0
Warner, Deborah, 1959-....
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U.S. House of Representatives - Public Domain
Gutiérrez, Luis V. (Luis Vicente), 1953-
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Hubbard, Louisa M., 1836-1906
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GhostPirate -
Davis, Joseph Robert, 1825-1896
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unknown - Public Domain
Corbett, Robert J. (Robert James), 1905-1971
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Notman Photography, Boston - Public Domain
Calkins, Mary Whiton, 1863-1930
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Boulter, Hugh, 1672-1742
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Wilson, John T. (John Thomas), 1811-1891
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Édouard Vuillard - Public Domain
Fabré, Lucien, 1889-1952
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Bourland, Roger, 1952-
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Santini, Giovanni, 1787-1877
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unknown photographer - Public Domain
Boberg, Carl Gustaf, 1859-
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Contemporary portrait - Public Domain
Channing, William Ellery, 1780-1842
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Morison, George Shattuck, 1842-1903
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DMS (ca. 1776-1890) <br/> - Public Domain
Huger, Daniel Elliott, 1779-1854
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Frakes, Jonathan
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unknown - Public Domain
Potter, Walter, 1835-1918
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Louise Palanker - CC BY-SA 2.0
Marshall, Garry
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Steiner, Rudolf, 1861-1925
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Patterson, Robert, 1792-1881
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MiamiFilmFestival - CC BY-SA 2.0
Ward, Anita, 1956-
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William J. Meuer Photoart Collection - Public Domain
Van Hise, Charles Richard, 1857-1918
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anonymous - Public Domain
Pyne, M. Taylor (Moses Taylor), 1855-1921
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Butler, Samuel, 1835-1902
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Baker, Snowy, 1884-1953