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unknown - Public Domain
Wmstribling - CC BY-SA 3.0
:de:Dora Carrington - Public Domain
from the Hutton/Stringer Archive, ''circa'' 1905. - Public Domain
Unknown - adjustments by uploader - Public Domain
:w:John Sartain - Public Domain
Abu al-Hasan (1589-1630) - Public Domain
Gordon Parks, Office of War Information - Public Domain
Nv8200p - CC BY-SA 3.0
David Shankbone - CC BY 2.5
United States Government - Public Domain
http://www1.appstate.edu/~kms/classes/psy3202/images/ClarkHull2.jpg -
Gabriel Grupello (1644-1730) - Public Domain
Alexei Kouprianov - CC BY 3.0
Thomas Lawrence -
United States National Museum/Smithsonian Institution - Public Domain
original uploader -
crownjulesb - CC BY-SA 2.0
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Lacretelle, Jacques de 1888-1985
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McClellan, George, 1796-1847
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unknown - Public Domain
Donn, Jorge, 1947-1992
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Wmstribling - CC BY-SA 3.0
Stribling, Robert M. (Robert Mackey), 1833-1914
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:de:Dora Carrington - Public Domain
Carrington, Dora de Houghton, 1893-1932
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from the Hutton/Stringer Archive, ''circa'' 1905. - Public Domain
Thomas, Edward, 1878-1917
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Unknown - adjustments by uploader - Public Domain
Degeyter, Pierre
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:w:John Sartain - Public Domain
Hays, Isaac, 1796-1879
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Abu al-Hasan (1589-1630) - Public Domain
Jahangir, Emperor of Hindustan, 1569-1627
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Wright, Orville, 1871-1948
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Sowerby, James de Carle, 1787-1871
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Gordon Parks, Office of War Information - Public Domain
Stewart, Rex, 1907-1967
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Nv8200p - CC BY-SA 3.0
Grann, David
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David Shankbone - CC BY 2.5
Abrams, Floyd
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Coughlin, Lawrence, 1929-
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United States Government - Public Domain
Wilmerding, John.
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unknown - Public Domain
Timerman, Jacobo, 1923-
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Reni, Guido, 1575-1642
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http://www1.appstate.edu/~kms/classes/psy3202/images/ClarkHull2.jpg -
Hull, Clark Leonard, 1884-1952
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Gabriel Grupello (1644-1730) - Public Domain
Grupello, Gabriel, 1644-1730
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Barrow, Edward Grant, 1868-1953
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Rungenhagen, Carl Friedrich, 1778-1851
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Bower, F.O. (Frederick Orpen), 1855-1948
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Alexei Kouprianov - CC BY 3.0
Schaffer, Simon, 1955-....
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MacVicar, Malcolm, 1829-1904
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Thayer, John R. (John Randolph), 1845-1916
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Thomas Lawrence -
Blessington, Charles John Gardiner, Earl of, 1782-1829
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United States National Museum/Smithsonian Institution - Public Domain
Schmitt, Waldo L. (Waldo Lasalle), 1887-1977
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original uploader -
Keyes, Henry Wilder, 1863-1938
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crownjulesb - CC BY-SA 2.0
Kendrick, Ellie, 1990-....