Image from Wikimedia Commons
Repro: Albert H. Payne († 1902) - Public Domain
Paul and Chester Farthing - Public Domain
American school of the 19th century -
Lord Leighton - Public Domain
US Government printing Office (Washington, DC), publisher. - Public Domain
unknown - Public Domain
Agence Rol - Public Domain
GrindtXX - CC BY-SA 3.0
Georges Biard - CC BY-SA 3.0
Thomazzo - Public Domain
World Economic Forum - CC BY-SA 2.0
The National Archives UK -
U.S. Department of State - Public Domain
Image from Wikimedia Commons
Harper, Charles, 1842-1912
Image from Wikimedia Commons
Repro: Albert H. Payne († 1902) - Public Domain
Wilt, Marie 1833-1891
Image from Wikimedia Commons
Paul and Chester Farthing - Public Domain
Wilson, Bluford, 1841-1924
Image from Wikimedia Commons
American school of the 19th century -
Mason, Jonathan, 1756-1831
Image from Wikimedia Commons
Ferry, Jules, 1832-1893
Image from Wikimedia Commons
Lord Leighton - Public Domain
Ross, Janet, 1842-1927
Image from Wikimedia Commons
Benson, Edward White, 1829-1896
Image from Wikimedia Commons
Bromberg, J. Edward, 1903-1951
Image from Wikimedia Commons
US Government printing Office (Washington, DC), publisher. - Public Domain
Hargis, Denver D. (Denver David), 1921-1989
Image from Wikimedia Commons
unknown - Public Domain
Oskam, Gerard Cornelis Adrianus 1880-1952
Image from Wikimedia Commons
Smith, Erastus, 1787-1837
Image from Wikimedia Commons
Agence Rol - Public Domain
Noté, Jean
Image from Wikimedia Commons
Field, Virginia, 1917-1992
Image from Wikimedia Commons
GrindtXX - CC BY-SA 3.0
Hardy, Thomas, 1752-1832
Image from Wikimedia Commons
Appleton, Edward Victor, sir, 1892-1965
Image from Wikimedia Commons
Huxley, Thomas Henry, 1825-1895
Image from Wikimedia Commons
Mallarmé, Stéphane, 1842-1898
Image from Wikimedia Commons
Angrand, Léonce, 1808-1886
Image from Wikimedia Commons
Georges Biard - CC BY-SA 3.0
Montand, Yves, 1921-1991
Image from Wikimedia Commons
Thomazzo - Public Domain
Judah Loew ben Bezalel, approximately 1525-1609
Image from Wikimedia Commons
Conder, Charles Edward, 1868-1909
Image from Wikimedia Commons
World Economic Forum - CC BY-SA 2.0
Ma, Yo-Yo, 1955-....
Image from Wikimedia Commons
Cunanan, Andrew, 1969-1997
Image from Wikimedia Commons
unknown - Public Domain
Kimball, Fiske, 1888-1955
Image from Wikimedia Commons
The National Archives UK -
Nkrumah, Kwame, 1909-1972
Image from Wikimedia Commons
Brice, Fanny, 1891-1951
Image from Wikimedia Commons
unknown - Public Domain
Dyas, Ada, 1843-1908
Image from Wikimedia Commons
Woodhouse, James, 1770-1809
Image from Wikimedia Commons
U.S. Department of State - Public Domain
Ghani, Ashraf, 1949-
Image from Wikimedia Commons
unknown - Public Domain
Duryea, Charles E., 1861-1938