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Pedro Agüero - Public Domain
John Mathew Smith & www.celebrity-photos.com - CC BY-SA 2.0
unknown -
Spencer Shier - Public Domain
Bureau of Engraving and Printing - Public Domain
Contemporary portrait - Public Domain
United States Senate Historical Office - Public Domain
William Hartley Jeffrey - Public Domain
Pep.per de Ré - CC BY 3.0
Toshi Ichiyanagi - Public Domain
Cmichel67 - CC BY-SA 4.0
Dimitri Papadimos - CC BY-SA 3.0
עדי כהן צדק - CC BY-SA 3.0
John Madison Hinde (Sketch) & Thomas S. Hinde (Diary) - Public Domain
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Sirota, Leo
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Pedro Agüero - Public Domain
Saco, José Antonio, 1797-1879
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John Mathew Smith & www.celebrity-photos.com - CC BY-SA 2.0
Walters, Barbara, 1929-2022
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unknown -
Levi, Hilde
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Spencer Shier - Public Domain
Hanson-Dyer, Louise, 1884-1962
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Aschoff, L. (Ludwig), 1866-1942
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Gowans, Brad
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Japp, Francis Robert, 1848-1925
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Fairbanks, Douglas, 1883-1939
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Abercromby, Alexander Abercromby, Lord, 1745-1795
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Ruppersberg, Allen 1944-
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Seelye, Julius H. (Julius Hawley), 1824-1895
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Bureau of Engraving and Printing - Public Domain
Calle, Paul
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Contemporary portrait - Public Domain
Ames, Oliver, 1807-1877
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Reid, Robert, 1774-1856.
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United States Senate Historical Office - Public Domain
Lennon, Alton, 1906-1986
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Yang, Chen Ning, 1922-....
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William Hartley Jeffrey - Public Domain
Tillotson, Lee S. (Lee Stephen), 1874-
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Gizzi, Peter
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De Gonzaga, Anne, 1616-1684
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Levertin, Oscar, 1862-1906
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Gruner, Olivier 1960-....
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Pep.per de Ré - CC BY 3.0
Hyppolite, Jean
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Toshi Ichiyanagi - Public Domain
Ichiyanagi, Toshi, 1933-....
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Smith, Morton, 1915-1991
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Cmichel67 - CC BY-SA 4.0
Watson, Albert, 1942-....
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Appleton, Daniel, 1785-1849
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Dimitri Papadimos - CC BY-SA 3.0
Sherrard, Philip
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עדי כהן צדק - CC BY-SA 3.0
Duchin, Arkadi, 1963-
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John Madison Hinde (Sketch) & Thomas S. Hinde (Diary) - Public Domain
Hinde, Thomas S. (Thomas Spottswood), 1785-1846