Image from Wikimedia Commons
Contemporary portrait - Public Domain
unknown - Public Domain
NASA - Public Domain
Bloodgood Cutter (author) - Public Domain
David Crerar - CC BY-SA 3.0
unknown photographer - Public Domain
Mathew B. Brady and Levin Corbin Handy Photographic Studios. - Public Domain
No coneguts -
Social Security Administration - Public Domain
The Schwadron Collection of the National Library of Israel - Public Domain
John Warden - Public Domain
Stephen Pearce - Public Domain
Mâitre de Jacques IV d'Écosse, vers 1502 - Public Domain
Ham - CC BY-SA 3.0
Konstantin Makovsky - Public Domain
Public Domain
Photographer not named. - Public Domain
Harry Palmer - Public Domain
Image from Wikimedia Commons
Crist, Charlie, 1956-
Image from Wikimedia Commons
Contemporary portrait - Public Domain
Duppa, Brian, 1588-1662
Image from Wikimedia Commons
unknown - Public Domain
De Seversky, Alexander P. (Alexander Procofieff), 1894-1974
Image from Wikimedia Commons
NASA - Public Domain
Carpenter, M. Scott, 1925-2013
Image from Wikimedia Commons
unknown - Public Domain
Cummins, Maria S. (Maria Susanna), 1827-1866
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Taylor, Thomas, 1758-1835
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Bergman, Torbern, 1735-1784
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Lee, Sophia, 1750-1824
Image from Wikimedia Commons
Bloodgood Cutter (author) - Public Domain
Cutter, Bloodgood H. (Bloodgood Haviland), 1817-1906
Image from Wikimedia Commons
David Crerar - CC BY-SA 3.0
Crerar, John, 1827-1889
Image from Wikimedia Commons
Johnston, Francis (architect)
Image from Wikimedia Commons
unknown photographer - Public Domain
Aavik, Juhan
Image from Wikimedia Commons
Mathew B. Brady and Levin Corbin Handy Photographic Studios. - Public Domain
Bundy, Solomon, 1823-1889
Image from Wikimedia Commons
No coneguts -
Schoenflies, A. (Arthur), 1853-1928
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Social Security Administration - Public Domain
Sullivan, Louis Wade, 1933-
Image from Wikimedia Commons
The Schwadron Collection of the National Library of Israel - Public Domain
Oyerbakh, Tsevi Binyamin, 1808-1872
Image from Wikimedia Commons
Anders, Allison
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John Warden - Public Domain
Warden, John A., 1943-
Image from Wikimedia Commons
Stephen Pearce - Public Domain
Richards, G. H. (George Henry)
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Mâitre de Jacques IV d'Écosse, vers 1502 - Public Domain
Master of James IV of Scotland, active 1488-1530
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Ham - CC BY-SA 3.0
Shaw, Richard Norman, 1831-1912
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Chatterjee, Ramananda, 1865-1943
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Konstantin Makovsky - Public Domain
Dargomyzhsky, Alexander
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Bertrand, Henri-Gratien, comte, 1773-1844
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Public Domain
Schwab, Michael, 1853-
Image from Wikimedia Commons
Jones, Thomas L. (Thomas Laurens), 1819-1887
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Photographer not named. - Public Domain
Clayton, Powell, 1833-1914
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Bonaparte, Elizabeth Patterson, 1785-1879
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Harry Palmer - Public Domain
Frye, Northrop
Image from Wikimedia Commons
Grégoire, Henri, 1750-1831