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unknown - Public Domain
The Göttingen Observatory photo, courtesy Hartmut Grosser. - Public Domain
Xz3024a - Public Domain
Photoplay magazine - Public Domain
Public Domain
Robert Thouless - Public Domain
Billy Rose Theatre Collection - Public Domain
LynnGilbert5 - CC BY-SA 4.0
after w:Godfrey Kneller - Public Domain
Seattle Municipal Archives - CC BY 2.0
Sylvester L. Malone, ed. - Public Domain
Simon Chambers - CC BY-SA 2.0
Carl Guderian - CC BY-SA 2.0
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Amundsen, Roald, 1872-1928
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Mann, Anthony, 1906-1967
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unknown - Public Domain
Rice, Isaac Leopold, 1850-1915
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Wanton, Joseph, 1705-1780
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The Göttingen Observatory photo, courtesy Hartmut Grosser. - Public Domain
Hertzsprung, Ejnar, 1873-1967
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Xz3024a - Public Domain
Keller, Otto, 1838-1927
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Photoplay magazine - Public Domain
Alden, Mary, 1883-1946
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Public Domain
Dal Pozzo, Cassiano, 1588-1657
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Robert Thouless - Public Domain
Thouless, Robert Henry, 1894-
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Billy Rose Theatre Collection - Public Domain
Jewel, Izetta, 1883-1978
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unknown - Public Domain
Arce, Ramón José de 1755-1844
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LynnGilbert5 - CC BY-SA 4.0
Vreeland, Diana
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Johnston, James Thomas, 1839-1904
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after w:Godfrey Kneller - Public Domain
Bridgewater, John Egerton, Earl of, 1646-1701
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Seattle Municipal Archives - CC BY 2.0
Landes, Bertha Knight, 1868-1943
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Bayle, Pierre, 1647-1706
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Public Domain
Dwight D. Eisenhower Library
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Norvins, M. de, 1769-1854
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Grousset, Paschal, 1844-1909
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Cahill, William T. (William Thomas), 1912-1996
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Sylvester L. Malone, ed. - Public Domain
McGlynn, Edward, 1837-1900
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Fennimore, Joseph
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Young, Casey, 1828-1899
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Fabergé, Peter Carl, 1846-1920
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Linnell, John, 1792-1882
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Simon Chambers - CC BY-SA 2.0
McNeil, Scott, 1962-
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Gentileschi, Orazio, 1563-1638?
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Carl Guderian - CC BY-SA 2.0
Oguibe, Olu, 1964-....
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Kandel, Eric Richard, 1929-
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Mathews, Charles, 1776-1835