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Mathew Brady - Public Domain
unknown - Public Domain
? - Public Domain
[http://www.futuremuseum.co.uk/Default.aspx?Id=13] - Public Domain
Matteo Contessi - CC BY-SA 4.0
Pollini - Public Domain
Moshe Pridan - Public Domain
François-Séraphin Delpech - Public Domain
Noel Debien - Public Domain
Argonne National Laboratory - Public Domain
John Singleton Copley - Public Domain
Nv8200p - CC BY-SA 3.0
George Grantham Bain Collection (Library of Congress) - Public Domain
Ttocs3y - CC BY-SA 2.5
Félix Nadar - Public Domain
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Webb, Sidney, 1859-1947
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Bond, Ward, 1903-1960
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Mathew Brady - Public Domain
Leggett, Mortimer Dormer, 1821-1896
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Hutchinson, Timothy, 1949-
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unknown - Public Domain
Henderson, Leonard, 1772-1833
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Cartellieri, Casimir Anton, 1772-1807
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Jackson, Millie
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? - Public Domain
Montgomery, John Berrien, 1794-
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Otto, Louis-Guillaume, comte de Mosloy, 1754-1817
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[http://www.futuremuseum.co.uk/Default.aspx?Id=13] - Public Domain
Hunter, John Kelso, 1802-1873
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Matteo Contessi - CC BY-SA 4.0
Bracci, Pietro, 1700-1773
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Pollini - Public Domain
Lopes, Fernão, approximately 1380-
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Moshe Pridan - Public Domain
Levitt, Arthur, 1900-1980
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François-Séraphin Delpech - Public Domain
Suchet, Louis-Gabriel, duc d'Albufera, 1770-1826
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Noel Debien - Public Domain
Goold, James Alipius (Irish archbishop and patron, 1812-1886)
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Carey, Harry, Jr., 1921-2012
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Bustamente y Guerra, José, 1759-1825
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Nishi, Kanako
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Garzoni, Giovanna, 1600-1670
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Argonne National Laboratory - Public Domain
Libby, Leona Marshall, 1919-....
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John Singleton Copley - Public Domain
Appleton, Nathaniel, 1693-1784
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Nv8200p - CC BY-SA 3.0
Kalman, Maira
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Malik, Charles Habib, 1906-1987
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Giordano, Luca, 1634-1705
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Iansons, Marius
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George Grantham Bain Collection (Library of Congress) - Public Domain
Limantour, José Yves
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Ttocs3y - CC BY-SA 2.5
Allison, C. FitzSimons (Christopher FitzSimons), 1927-
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Félix Nadar - Public Domain
Gramont, Élisabeth de, 1875-1954
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Vouet, Simon, 1590-1649
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George Grantham Bain Collection (Library of Congress) - Public Domain
Darwin, Leonard, 1850-1943