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unknown - Public Domain
National Academy of Sciences - Public Domain
Escarlati, Adobe Photoshop, sobre un dibujo de la época. - Public Domain
Henry Bryan Hall, Sr. - Public Domain
Marie-Lan Nguyen (Jastrow) - CC BY 2.5
original uploader - Public Domain
Leandro Emede (collaboratore di Oliviero Toscani) <small>Original uploader was :it:Leosugar -
Mathew Brady Levin Corot Handy - Public Domain
United States Navy - Public Domain
No photographer named in original source. - Public Domain
Bxzooo - CC BY-SA 3.0
Public Domain
David d’Angers - Public Domain
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unknown - Public Domain
Goodfellow, George Emory, 1855-1910
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Seidl, Gabriel von 1848-1913
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Borgia, Cesare, 1476?-1507
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National Academy of Sciences - Public Domain
Giles, Norman H., 1915-2006
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Escarlati, Adobe Photoshop, sobre un dibujo de la época. - Public Domain
Forner, Juan Pablo, 1756-1797
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Merck, Johann Heinrich, 1741-1791
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unknown - Public Domain
Costaguti, Vincenzo
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unknown - Public Domain
Jordan, Elizabeth Garver, 1867-1947
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Ramis, Harold
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Henry Bryan Hall, Sr. - Public Domain
Febiger, Christian, 1746-1796
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Marie-Lan Nguyen (Jastrow) - CC BY 2.5
Jolivet, Pierre
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Garrett, Augustus, 1801-1848
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Marryat, C. (Charles), 1827-1906
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Boyle, Robert, 1627-1691
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original uploader - Public Domain
Sesqui-Centennial International Exposition (1926 : Philadelphia, Pa.)
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Leandro Emede (collaboratore di Oliviero Toscani) <small>Original uploader was :it:Leosugar -
Toscani, Oliviero
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Mathew Brady Levin Corot Handy - Public Domain
Curtis, C. B. (Carlton Brandaga), 1811-1883
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Tukur, Ulrich, 1957-....
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Allgood, Sara 1879-1950
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United States Navy - Public Domain
Lemon, Meadowlark
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unknown - Public Domain
Woodward, Arthur Smith, 1864-1944
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original uploader - Public Domain
Shulze, John Andrew, 1775-1852
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unknown - Public Domain
Faÿ, Bernard 1893-1978
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Corning, Parker, 1874-1943
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No photographer named in original source. - Public Domain
Dryden, Helen, 1887-
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Fjellstedt, Peter, 1802-1881
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Sèze, Raymond de 1748-1828
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Bxzooo - CC BY-SA 3.0
Adler, Peggy
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Public Domain
Müller, George, 1805-1898
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David d’Angers - Public Domain
Boissonade, Jean-François, 1774-1857