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unknown - Public Domain
USGov-Military-Army - Public Domain
John SartainRobert Telfer - Public Domain
Carl Størmer - CC BY-SA 3.0
Unknown author - Public Domain
20minutos.es (donated to the website's Virtual Museum of Old Photos by Agustin Pedrote Aznar) - CC BY-SA 3.0
Ohio Historical Society? - Public Domain
J. Dörfler (1906 - 1907) Botaniker Porträts - Public Domain
James Abbe - Public Domain
Helio85 - CC BY-SA 3.0
Rengha Rodewill - CC BY-SA 4.0
Public Domain
Huntington Theatre Company - CC BY 2.0
Hermann Struck - Public Domain
Copyright holder - Daniel Singer - CC BY-SA 3.0
Nihonjoe -
Image from Wikimedia Commons
unknown - Public Domain
Mazzoni, Guido, 1859-1943
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USGov-Military-Army - Public Domain
Butterfield, Daniel, 1831-1901
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John SartainRobert Telfer - Public Domain
Soto, Hernando de, approximately 1500-1542
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unknown - Public Domain
Goodfellow, George Emory, 1855-1910
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Carl Størmer - CC BY-SA 3.0
Geelmuyden, H. (Hans), 1844-1920
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Unknown author - Public Domain
Costa, Alexandrina Maria da 1904-1955
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Gish, Dorothy
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20minutos.es (donated to the website's Virtual Museum of Old Photos by Agustin Pedrote Aznar) - CC BY-SA 3.0
Moreno Torroba, Federico, 1891-1982
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Romero, Sílvio, 1851-1914
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unknown - Public Domain
Wise, F. J. S. (Frank Joseph Scott), 1897-1986
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Ohio Historical Society? - Public Domain
Campbell, Alexander, 1779-1857
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J. Dörfler (1906 - 1907) Botaniker Porträts - Public Domain
Fries, Theodor Magnus, 1832-1913
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Stengel, Alfred, 1868-1939
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James Abbe - Public Domain
Molyneux, Edward Henry, 1891-1974
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Sinise, Gary
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Sayatʻ-Nova, 1712-1795
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Helio85 - CC BY-SA 3.0
Cigoli, Ludovico Cardi da 1559-1613
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Rengha Rodewill - CC BY-SA 4.0
Strittmatter, Eva, 1930-2011
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Poncins, Gontran de, 1900-
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Public Domain
Cilley, Joseph, 1791-1887
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Mond, Robert, 1867-1938
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unknown - Public Domain
Gordon, John Brown, 1832-1904
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unknown - Public Domain
Lebedev, P. N. (Petr Nikolaevich), 1866-1912
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Huntington Theatre Company - CC BY 2.0
Monk, Debra, 1949-
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Spark, Debra, 1962-
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Druschetzky, Georg, 1745-1819
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Hermann Struck - Public Domain
Schmidt, Erich, 1853-1913
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Blunt, James, 1974-
Image from Wikimedia Commons
Copyright holder - Daniel Singer - CC BY-SA 3.0
Singer, Daniel
Image from Wikimedia Commons
Nihonjoe -
Chamberlin, Ann