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John Christen Johansen, all rights subsequently vested in the United States Court of Appeals for the District of Columbia Circuit - Public Domain
Unknown - Public Domain
unknown - Public Domain
Joseph003 - CC BY-SA 4.0
Nadar (Gaspard-Félix Tournachon; 1820-1910) - Public Domain
Uzyzzx - Public Domain
unknown Photograf (Studio, Praha, 1918) - Public Domain
John Clostermann - Public Domain
Félix Nadar - Public Domain
Rhododendrites - CC BY-SA 4.0
Gregory Short -
I. Goldman - Public Domain
National Photo Company Collection - Public Domain
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French, Henry F. (Henry Flagg), 1813-1885
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Gerling, Christian Ludwig, 1788-1864
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John Christen Johansen, all rights subsequently vested in the United States Court of Appeals for the District of Columbia Circuit - Public Domain
Groner, Duncan L. (Duncan Lawrence), 1873-1957
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Unknown - Public Domain
Kellerman, W. A. (William Ashbrook), 1850-1908
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unknown - Public Domain
Yerkes, Charles Tyson, 1837-1905
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Lowell, James Russell, 1819-1891
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Joseph003 - CC BY-SA 4.0
Astell, Mary, 1668-1731
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Forel, F.A. (François Alphonse), 1841-1912
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Nadar (Gaspard-Félix Tournachon; 1820-1910) - Public Domain
Uzanne, Octave, 1852-1931
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Režucha, Bystrík
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Uzyzzx - Public Domain
Glass, George, 1910-
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unknown Photograf (Studio, Praha, 1918) - Public Domain
Frič, Alberto Vojtěch, 1882-1944
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Pollack, Eileen, 1956-....
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John Clostermann - Public Domain
Rutland, John Manners, Duke of, 1638-1711
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Adams, Charles Kendall, 1835-1902
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Fechner, Gustav Theodor, 1801-1887
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Félix Nadar - Public Domain
Gautier, Théophile, 1811-1872
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Rhododendrites - CC BY-SA 4.0
Westheimer, Ruth K. (Ruth Karola), 1928-
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Zeeland, Paul van, 1893-1973
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Sparks, Edwin Erle, 1860-1924
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Palca, Joe
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Gregory Short -
Short, Gregory, 1938-1999
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Weld, Frederick Aloysius, Sir, 1823-1891
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Méhul, Etienne Nicolas
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unknown - Public Domain
Baermann, Heinrich, 1784-1847
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unknown - Public Domain
Schreiner, Olive, 1855-1920
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I. Goldman - Public Domain
Leeser, Isaac, 1806-1868
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Miotte, Jean, 1926-....
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Brown, Lancelot, 1716-1783
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National Photo Company Collection - Public Domain
Sladen, Fred W. (Fred Winchester), 1867-1945