Image from Wikimedia Commons
Benjamin Robert Haydon - Public Domain
Self-portrait - CC BY-SA 3.0
Elya - CC BY-SA 4.0
National Photo Company Collection. - Public Domain
Harry Pot:w:Anefo - CC BY 4.0
Nv8200p - CC BY-SA 3.0
Swetapadma07 - CC BY-SA 3.0
TonyTheTiger - CC BY-SA 2.5
Not listed - Public Domain
Pak doo ik - Public Domain
Silas Farmer - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
not stated - Public Domain
Eugène Pirou - Public Domain
Perry, William Stevens - Public Domain
Central Intelligence Agency (CIA) - Public Domain
anonymous -
W. W. Foster - Public Domain
Image from Wikimedia Commons
Benjamin Robert Haydon - Public Domain
Jeremie, John, Sir, 1795-1841
Image from Wikimedia Commons
Self-portrait - CC BY-SA 3.0
Deitch, Gene
Image from Wikimedia Commons
Savage, Michael Joseph, 1872-1940
Image from Wikimedia Commons
Flon, Suzanne, 1918-2005
Image from Wikimedia Commons
Wurzbach, Harry McLeary, 1874-1931
Image from Wikimedia Commons
Elya - CC BY-SA 4.0
Böhm, G. (Gottfried), 1920-....
Image from Wikimedia Commons
Das, Sarat Chandra, 1849-1917
Image from Wikimedia Commons
Martins, Peter
Image from Wikimedia Commons
National Photo Company Collection. - Public Domain
Hamilton, Nancy, 1908-1985
Image from Wikimedia Commons
Mastroianni, Marcello, 1924-1996.
Image from Wikimedia Commons
Harry Pot:w:Anefo - CC BY 4.0
Kay, Connie
Image from Wikimedia Commons
Nv8200p - CC BY-SA 3.0
Hopkins, Ellen
Image from Wikimedia Commons
Swetapadma07 - CC BY-SA 3.0
Kurien, Verghese, 1921-2012
Image from Wikimedia Commons
TonyTheTiger - CC BY-SA 2.5
William W. Kimball House (Chicago, Ill.)
Image from Wikimedia Commons
Not listed - Public Domain
Jeffries, James J., 1875-1953
Image from Wikimedia Commons
Allen, C.F. (Carl Ferdinand), 1811-1871
Image from Wikimedia Commons
Pak doo ik - Public Domain
Vanel, Charles, 1892-1989
Image from Wikimedia Commons
Silas Farmer - Public Domain
Witherell, James, 1759-1838
Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Dockery, Oliver H. (Oliver Hart), 1830-1906
Image from Wikimedia Commons
Pearson, Frederick Stark, 1861-1915
Image from Wikimedia Commons
Watson, Thomas, 1557?-1592?
Image from Wikimedia Commons
not stated - Public Domain
Miller, Harriet Mann, 1831-1918
Image from Wikimedia Commons
Müller, Lauro 1863-1926
Image from Wikimedia Commons
Eugène Pirou - Public Domain
Flammarion, Camille, 1842-1925
Image from Wikimedia Commons
Perry, William Stevens - Public Domain
Morris, Benjamin Wistar, 1819-1906
Image from Wikimedia Commons
Evans, Lane, 1951-
Image from Wikimedia Commons
Central Intelligence Agency (CIA) - Public Domain
Colby, William Egan, 1920-1996
Image from Wikimedia Commons
anonymous -
Demolder, Eugène, 1862-1919
Image from Wikimedia Commons
Crowder, E. H. (Enoch Herbert), 1859-1932
Image from Wikimedia Commons
W. W. Foster - Public Domain
Byrd, Richard Evelyn, 1860-1925