Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Contemporary photograph - Public Domain
Omar Bárcena - CC BY 2.0
Georges Biard - CC BY-SA 3.0
Peterson, Harry C. - Public Domain
Thomas Pennant - Public Domain
George Grantham Bain Collection (Library of Congress) - Public Domain
Nadar Upload and restoration by Jebulon - CC0 1.0
De Wit, Frederik - Public Domain
Huntington Theatre Company - CC BY 2.0
National Photo Company - Public Domain
Avjoska - CC BY 3.0
Rudolf Dührkoop - Public Domain
unknown - Public Domain
Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Hoskins, George Gilbert, 1824-1893
Image from Wikimedia Commons
Contemporary photograph - Public Domain
Matheson, George, 1842-1906
Image from Wikimedia Commons
Omar Bárcena - CC BY 2.0
Shulman, Julius, 1910-2009
Image from Wikimedia Commons
Harris, Miriam Coles, 1834-1925
Image from Wikimedia Commons
Georges Biard - CC BY-SA 3.0
Keaton, Michael, 1951-...
Image from Wikimedia Commons
Blockx, Jan, 1851-1912
Image from Wikimedia Commons
Peterson, Harry C. - Public Domain
Sutter, John Augustus, 1826-1897
Image from Wikimedia Commons
Ray, Edward J. (Edward John), 1944-
Image from Wikimedia Commons
Thomas Pennant - Public Domain
South, Robert, 1634-1716
Image from Wikimedia Commons
Wilson, Don, 1900-1982
Image from Wikimedia Commons
George Grantham Bain Collection (Library of Congress) - Public Domain
Guiterman, Arthur, 1871-1943
Image from Wikimedia Commons
Emmet, Robert, 1778-1803
Image from Wikimedia Commons
Abdul Razak bin Dato' Hussein, Tun Haji, 1922-1976
Image from Wikimedia Commons
Della-Maria, Dominique, 1769-1800
Image from Wikimedia Commons
Nadar Upload and restoration by Jebulon - CC0 1.0
Reuter, Paul Julius, 1816-1899
Image from Wikimedia Commons
Brown, William Laurence, 1755-1830
Image from Wikimedia Commons
De Wit, Frederik - Public Domain
Wit, Frederik de
Image from Wikimedia Commons
Wilson, J. Stitt (Jackson Stitt), 1868-1942
Image from Wikimedia Commons
Guardia, Tomás, 1832-1882
Image from Wikimedia Commons
Huntington Theatre Company - CC BY 2.0
Diamond, Lydia R., 1969-
Image from Wikimedia Commons
Renan, Ernest, 1823-1892
Image from Wikimedia Commons
National Photo Company - Public Domain
Quayle, John Francis, 1868-1930
Image from Wikimedia Commons
Avjoska - CC BY 3.0
Arrak, Jüri 1936-
Image from Wikimedia Commons
Doppler, Franz, 1821-1883
Image from Wikimedia Commons
Rudolf Dührkoop - Public Domain
Harden, Maximilian, 1861-1927
Image from Wikimedia Commons
Jackson, Freda, 1909-1990
Image from Wikimedia Commons
unknown - Public Domain
Arriola, Fortunato, 1827-1872
Image from Wikimedia Commons
Smith, Ellison DuRant, 1866-1944
Image from Wikimedia Commons
unknown - Public Domain
Ainslie, George Robert, 1776-1839
Image from Wikimedia Commons
Ouyang, Xiu, 1007-1072.