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unknown - CC BY-SA 4.0
Gage Skidmore - CC BY-SA 3.0
Unknown (picture) / R. Mathis (scan) - Public Domain
Public Domain
Paul Katzenberger - CC BY-SA 3.0
Generalitat de Catalunya, Departament de la Presidència -
unknown - Public Domain
idem -
Franck Bohbot - CC BY-SA 4.0
unknown; if official congressional portrait, then legally U.S. Senate. - Public Domain
Thom C - CC BY 2.0
Kleon3 - Public Domain
Sailko - CC BY-SA 3.0
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unknown - CC BY-SA 4.0
Aucamp, Hennie
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Pietro, da Cortona, 1596-1669
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Gage Skidmore - CC BY-SA 3.0
Braga, Brannon
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Unknown (picture) / R. Mathis (scan) - Public Domain
Viollet, Paul, 1840-1914
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Gates, Daryl F., 1926-2010
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Public Domain
Carter, Henry Hare, 1906-....
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Paul Katzenberger - CC BY-SA 3.0
Grosse, Nina
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Hill, Julia Butterfly
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Hammerschmidt, John Paul, 1922-
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Davies, Stephen Owen, approximately 1883-1972
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Hamilton, Alexander Hamilton Douglas, duke of, 1767-1852
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Borden, Olive, 1906-1947
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Debye, Peter J. W. (Peter Josef William), 1884-1966
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Saleam, Jim
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Generalitat de Catalunya, Departament de la Presidència -
Aragall, Giacomo
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Samaroff, Olga
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Backofen, Johann Georg Heinrich, 1768-1839
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Lewis, Estelle Anna Robinson, 1824-1880
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Gaines, John W. (John Wesley), 1860-1926
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unknown - Public Domain
Kinney, John F. (John Fitch), 1816-1902
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Meyer, Bertrand, 1950-....
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unknown - Public Domain
Merelli, B.
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Marmontel, Jean-François, 1723-1799
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Germaine, Queen, consort of Ferdinand V, King of Spain, 1488-1538
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idem -
Brooke, Jocelyn
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Franck Bohbot - CC BY-SA 4.0
Rosand, Aaron
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unknown; if official congressional portrait, then legally U.S. Senate. - Public Domain
Turner, George, 1850-1932
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Thom C - CC BY 2.0
Larkin, Patty
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Kleon3 - Public Domain
Milow, Keith, 1945-
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Sailko - CC BY-SA 3.0
Platina, 1421-1481