Image from Wikimedia Commons
Ifirsten - CC BY-SA 4.0
Thomas Dix, Grenzach, http://www.dix-fotodesign.de - CC BY-SA 2.0
Faizul Latif Chowdhury - CC BY-SA 4.0
Arnold Genthe - Public Domain
Public Domain
Kijowski - CC BY 3.0
Handship - CC BY-SA 3.0
Uyvsdi - Public Domain
National Photo Co. - Public Domain
unknown - Public Domain
O.H. Willard - Public Domain
Mathew Brady - Public Domain
Martial34 - CC BY-SA 3.0
Rudolph Ackermann - Public Domain
Spcsnvsnjmc - CC BY-SA 3.0
Unknown German photograph, 1900 - Public Domain
Not stated - Public Domain
Image from Wikimedia Commons
Alabaster, William, 1567-1640
Image from Wikimedia Commons
Ifirsten - CC BY-SA 4.0
Firstenberg, Sam, 1950-
Image from Wikimedia Commons
Thomas Dix, Grenzach, http://www.dix-fotodesign.de - CC BY-SA 2.0
Tarr, Edward H.
Image from Wikimedia Commons
Israëls, Jozef, 1824-1911
Image from Wikimedia Commons
Faizul Latif Chowdhury - CC BY-SA 4.0
Naipaul, V.S. (Vidiadhar Surajprasad), 1932-
Image from Wikimedia Commons
Arnold Genthe - Public Domain
Zuloaga, Ignacio, 1870-1945
Image from Wikimedia Commons
Public Domain
Gordon, J. M. (Joseph Maria), 1856-1929
Image from Wikimedia Commons
Kijowski - CC BY 3.0
Ciołek, Erazm
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Kaiser, F. (Frederik), 1808-1872
Image from Wikimedia Commons
Handship - CC BY-SA 3.0
Baranda, Joaquín 1840-1909
Image from Wikimedia Commons
Uyvsdi - Public Domain
Gomez, Jewelle, 1948-
Image from Wikimedia Commons
National Photo Co. - Public Domain
McMillan, Thomas Sanders, 1888-1939
Image from Wikimedia Commons
unknown - Public Domain
Hodgkin, A. L. (Alan Lloyd)
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Paddock, Algernon Sidney, 1830-1897
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O.H. Willard - Public Domain
Willard, Antonia Ford, 1838-1871
Image from Wikimedia Commons
Mathew Brady - Public Domain
Etheridge, Emerson, 1819-1902
Image from Wikimedia Commons
Martial34 - CC BY-SA 3.0
Gringore, Pierre, approximately 1475-1538?
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unknown - Public Domain
Laussat, Pierre-Clément de, 1756-1835
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unknown - Public Domain
LeClair, Antoine, 1797-
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Rudolph Ackermann - Public Domain
Chichele, Henry, 1362?-1443
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Ferguson, Emory Canda, 1833-1911
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LL Cool J, 1968-
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Pintoricchio, approximately 1454-1513
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Spcsnvsnjmc - CC BY-SA 3.0
Clay, Grady.
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Gerrity, Thomas P. (Thomas Patrick), 1913-1968
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unknown - Public Domain
Krapf, J.L. (Johann Ludwig), 1810-1881
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Smith, S. Percy (Stephenson Percy), 1840-1922
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unknown - Public Domain
Seabrook, Whitemarsh B. (Whitemarsh Benjamin), 1795-1855
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Unknown German photograph, 1900 - Public Domain
Stettenheim, Julius, 1831-1916
Image from Wikimedia Commons
Not stated - Public Domain
Mahony, Francis, 1804-1866