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Lightmanalan - Public Domain
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unknown - Public Domain
anonymous - Public Domain
Marcel Baschet - Public Domain
Ragtimedorianhenry2010 - Public Domain
J.C. Strauss Studio - Public Domain
Jacques Reich (based on an earlier work by another artist) - Public Domain
credited to Ernest deKoven Leffingwell; cropped by uploader - Public Domain
user at project - Public Domain
C. Magalli. - Public Domain
Wash-Photo-Co. - Public Domain
L. Sabattier - Public Domain
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Galdikas, Adomas, 1893-1969
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Lightmanalan - Public Domain
Lightman, Alan P., 1948-
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Hebräische Wikipedia - CC BY-SA 4.0
Baer, Yitzhak, 1888-1980
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Goldsman, Akiva
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Proust, Marcel, 1871-1922
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From a photograph by Brady. - Public Domain
Page, Thomas Jefferson, 1808-1899
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unknown - Public Domain
Musil, Robert, 1880-1942
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Schiller, Leon, 1887-1954
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unknown - Public Domain
Gonzaga-Colonna, Giulia di, duchessa di Traetto, 1513?-1566
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anonymous - Public Domain
Bowen, Herbert Wolcott, 1856-1927
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Marcel Baschet - Public Domain
Broglie, Maurice de, 1875-1960
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Ragtimedorianhenry2010 - Public Domain
Bowman, Euday L. (Euday Louis), 1887-1949
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Murillo, Bartolomé Esteban, 1617-1682
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Marchesi, Luigi, 1755-1829
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J.C. Strauss Studio - Public Domain
Fordyce, Samuel Wesley, 1840-1919
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Jacques Reich (based on an earlier work by another artist) - Public Domain
Ponce de León, Juan, 1460?-1521
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Liotta, Ray
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credited to Ernest deKoven Leffingwell; cropped by uploader - Public Domain
Leffingwell, Ernest De Koven, 1876-1971.
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user at project - Public Domain
Tegmark, Max
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unknown - Public Domain
Fasch, Johann Friedrich, 1688-1758
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Trajkovic, Slobodan
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Stewart, Alice M. (Alice Mary), 1906-2002
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Tam, Vivienne
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Bennett, Alfred W. (Alfred William), 1833-1902
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Eiffel, Gustave, 1832-1923
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C. Magalli. - Public Domain
Salvini, Anton Maria, 1653-1729
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Memmo, Marcantonio, -1615
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Wash-Photo-Co. - Public Domain
Longfellow, Alice M. (Alice Mary), 1850-1928
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Derwentwater, James Radcliffe, Earl of, 1689-1716
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L. Sabattier - Public Domain
Henry, Hubert-Joseph, 1846-1898