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unknown - Public Domain
Elena Klusemann-Hochman - CC BY-SA 3.0
Georges Biard - CC BY-SA 3.0
Mouh2jijel - CC BY-SA 3.0
Mathew Brady Levin Corot Handy - Public Domain
Peter Holler - Public Domain
Martin Kraft - CC BY-SA 3.0
No photographer named in original source. - Public Domain
anonymous - Public Domain
Florida Memory - Public Domain
Public Domain
Kristin Dos Santos - CC BY-SA 2.0
Hanahamplova - CC BY-SA 3.0
Image from Wikimedia Commons
unknown - Public Domain
Britton, Nathaniel Lord, 1859-1934
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Elena Klusemann-Hochman - CC BY-SA 3.0
Klusemann, Georg, 1942-
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Taschenberg, Ernst Ludwig, 1818-1898
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Georges Biard - CC BY-SA 3.0
Scob, Édith, 1937-....
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Mouh2jijel - CC BY-SA 3.0
Cheb Hasni, 1968-1994
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Vorstius, Conradus, 1569-1622
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unknown - Public Domain
Gleason, Patrick J. (Patrick Jerome), 1844-1901
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Meyer, Agnes Elizabeth Ernst, 1887-1970
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Lamoignon de Basville, M. de (Nicolas), 1648-1724
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Mathew Brady Levin Corot Handy - Public Domain
Pettis, Solomon Newton, 1827-1900
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Kammhuber, Josef
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Benham, Harry, 1886-1969
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Peter Holler - Public Domain
Porter, David Rittenhouse, 1788-1867
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Hays, Robert, 1947-....
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Case, Anna, 1888-1984
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Martin Kraft - CC BY-SA 3.0
Hirschbiegel, Oliver
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No photographer named in original source. - Public Domain
Hapgood, Isabel Florence, 1850-1928
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Ellis, Sarah Stickney, 1799-1872
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anonymous - Public Domain
Laub, Ferdinand, 1832-1875
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Normanby, Constantine Henry Phipps, Marquess of, 1797-1863
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Fontana, Bill, 1947-
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Rotblat, Joseph, 1908-2005
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Florida Memory - Public Domain
Young, Arthur M., 1905-
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Ivan Aleksandŭr, Czar of Bulgaria, -1371
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Public Domain
Pennoyer, Sylvester, 1831-1902
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Jones, Owen, 1819-1878
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Moorman, Thomas S. (Thomas Samuel), 1910-1997
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Kristin Dos Santos - CC BY-SA 2.0
Laurie, Hugh, 1959-....
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unknown - Public Domain
Darbyshire, Alfred, 1839-1908
Image from Wikimedia Commons
Hanahamplova - CC BY-SA 3.0
Boštík, Václav, 1913-