Image from Wikimedia Commons
US Government Printing Office - Public Domain
Contemporary portrait owned by the Royal Engineers - Public Domain
unknown - CC BY-SA 4.0
unknown photographer - Public Domain
Frederick Hollyer (1837-1933) - Public Domain
Ali kazak 9 - CC BY-SA 3.0
Public Domain
S. Hurok (classical Arts concert promoter) - Public Domain
Thomas Burford Hans Hysing - Public Domain
unknown - Public Domain
NBC Television - Public Domain
Unknown photographer for the Otto Sarony Company - Public Domain
American Colony (Jerusalem) Photo Department photographer - Public Domain
Biblioteca (BCN) Congreso Nacional de Chile - CC BY 2.0
W. A. Retzer<ref name="Dear-Master-2004" /> - Public Domain
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Bledsoe, Jesse, 1776-1836
Image from Wikimedia Commons
US Government Printing Office - Public Domain
Kilday, Paul Joseph, 1900-1968
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Contemporary portrait owned by the Royal Engineers - Public Domain
Pasley, Charles William, Sir, 1780-1861
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unknown - CC BY-SA 4.0
Preuss, Arthur, 1871-1934
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unknown photographer - Public Domain
Johnson, Osa, 1894-1953
Image from Wikimedia Commons
Frederick Hollyer (1837-1933) - Public Domain
Rodd, Rennell, 1858-1941
Image from Wikimedia Commons
Ali kazak 9 - CC BY-SA 3.0
Vanunu, Mordechai
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Rothier, Léon 1874-1951
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Public Domain
Roukema, Marge, 1929-2014
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Maittaire, Michael, 1667-1747
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Tallmadge, Frederick Augustus, 1792-1869
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Struve, Petr Berngardovich, 1870-1944
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Cartier, George-Étienne, Sir, 1814-1873
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S. Hurok (classical Arts concert promoter) - Public Domain
Costa, Mary
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Thomas Burford Hans Hysing - Public Domain
Giffard, Bonaventure, 1642-1734
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unknown - Public Domain
Alvarez, Mabel, 1891-1985
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unknown photographer - Public Domain
Carroll, Harry
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Madrazo y Garreta, Raimundo de 1841-1920
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Natividad, Kitten
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Marais, Eugène N. (Eugène Nielen), 1871-1936
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unknown - Public Domain
Chapman, Frank M. (Frank Michler), 1864-1945
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Muskie, Edmund S., 1914-1996
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NBC Television - Public Domain
Burrud, Bill
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Gentileschi, Artemisia, 1593-1652 or 1653
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Fichet, Pierre
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Unknown photographer for the Otto Sarony Company - Public Domain
Fiske, Harrison Grey, 1861-1942
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American Colony (Jerusalem) Photo Department photographer - Public Domain
Magnes, Judah Leon, 1877-1948
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Coverdale, Miles, 1488-1568
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Biblioteca (BCN) Congreso Nacional de Chile - CC BY 2.0
Allende B., María Isabel
Image from Wikimedia Commons
W. A. Retzer<ref name="Dear-Master-2004" /> - Public Domain
Cocke, John Hartwell, 1780-1866