Image from Wikimedia Commons
Al Ravenna, World Telegram staff photographer - Public Domain
Ashley Rehnblom - CC BY 2.0
Collections - Public Domain
unknown - Public Domain
James Terry White, Editor. Artist not credited - Public Domain
Samuel Willard - Public Domain
Original:n/a; Telrúnya - Public Domain
unknown photographer - Public Domain
Aimé Dupont - Public Domain
Atelier Nadar - Public Domain
Procurandolucas - CC BY-SA 4.0
Public Domain
GabboT - CC BY-SA 2.0
George Grantham Bain Collection (Library of Congress) - Public Domain
Image from Wikimedia Commons
Al Ravenna, World Telegram staff photographer - Public Domain
Kempton, Murray, 1917-1997
Image from Wikimedia Commons
Teixidor, Jordi
Image from Wikimedia Commons
Brooks, Romaine
Image from Wikimedia Commons
Negroponte, Nicholas.
Image from Wikimedia Commons
Ashley Rehnblom - CC BY 2.0
Martin, Billy, 1981-
Image from Wikimedia Commons
Collections - Public Domain
Roberts, Needham, 1901-1949
Image from Wikimedia Commons
unknown - Public Domain
Hamilton, William Rowan, Sir, 1805-1865
Image from Wikimedia Commons
unknown - Public Domain
Bamberger, Louis, 1855-1944
Image from Wikimedia Commons
James Terry White, Editor. Artist not credited - Public Domain
Johnson, Joseph, 1785-1877
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Ghalib, Mirza Asadullah Khan, 1797-1869
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Cope, Marianne, Saint, 1838-1918
Image from Wikimedia Commons
Samuel Willard - Public Domain
Willard, Samuel, 1640-1707
Image from Wikimedia Commons
Ali Paşa, Tepedelenli, 1744?-1822
Image from Wikimedia Commons
Original:n/a; Telrúnya - Public Domain
Comerre, Léon, 1850-1916
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unknown photographer - Public Domain
Grundén, Per 1922-2011
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unknown - Public Domain
Nicol, G. (George)
Image from Wikimedia Commons
Aimé Dupont - Public Domain
Glasgow, Ellen Anderson Gholson, 1873-1945
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Arago, F. (François), 1786-1853
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Peale, Titian Ramsay, 1799-1885
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Corrigan, Douglas, 1907-1995
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Rancé, Armand Jean Le Bouthillier de, 1626-1700
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unknown - Public Domain
Panciroli, Giovanni Giacomo
Image from Wikimedia Commons
Haislip, Wade H. (Wade Hampton), 1889-1971
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Cloots, Anacharsis, 1755-1794
Image from Wikimedia Commons
Atelier Nadar - Public Domain
Viardot, Paul, 1857-1941
Image from Wikimedia Commons
Procurandolucas - CC BY-SA 4.0
Fernandes, Maria Helena Rosas
Image from Wikimedia Commons
Dick, Beau
Image from Wikimedia Commons
Public Domain
Kelley, Daniel E., 1843-1905
Image from Wikimedia Commons
GabboT - CC BY-SA 2.0
Flanery, Sean Patrick.
Image from Wikimedia Commons
George Grantham Bain Collection (Library of Congress) - Public Domain
Fonck, René, 1894-1953