Image from Wikimedia Commons
Eugène Verboeckhoven - Public Domain
Morpheusmedia - CC BY-SA 3.0
Ahodges7 - Public Domain
unknown photographer - Public Domain
Luvwomercy - CC BY-SA 3.0
Unknown War Photographer - Public Domain
John McMillan - Public Domain
Joseph Simpson - Public Domain
Joseph Williamson, author. Long, Short and Harmon (Portland, ME), publisher. - Public Domain
Jean Auguste Dominique Ingres - Public Domain
Georges Biard - CC BY-SA 3.0
unknown - Public Domain
Fuzheado - CC BY-SA 4.0
Not listed - Public Domain
Unnamed photographer for Bain News Service - Public Domain
Bob Sindel - CC BY 3.0
Not stated - Public Domain
Titanium97 - CC BY-SA 3.0
Artist unidentified - Public Domain
Volberg - CC BY-SA 3.0
Image from Wikimedia Commons
Eugène Verboeckhoven - Public Domain
Schelfhout, Andreas, 1787-1870
Image from Wikimedia Commons
Cornélissen, Christiaan (1864-1943).
Image from Wikimedia Commons
Morpheusmedia - CC BY-SA 3.0
Maier, Tomas
Image from Wikimedia Commons
Ahodges7 - Public Domain
Beebe, William Sully, 1841-1898
Image from Wikimedia Commons
unknown photographer - Public Domain
Wagner, Winifred
Image from Wikimedia Commons
Rovelli, Carlo, 1956-....
Image from Wikimedia Commons
Luvwomercy - CC BY-SA 3.0
Parnell, Lee Roy, 1956-
Image from Wikimedia Commons
Unknown War Photographer - Public Domain
Yarnell, Harry E. (Harry Ervin), 1875-1959
Image from Wikimedia Commons
Butler, Henry Montagu, 1833-1918
Image from Wikimedia Commons
Ogburn, Charlton, 1882-1962
Image from Wikimedia Commons
John McMillan - Public Domain
Munro, Grant
Image from Wikimedia Commons
Joseph Simpson - Public Domain
Palmer, William, 1824-1856
Image from Wikimedia Commons
Wilkinson, Ernest L., 1899-1978
Image from Wikimedia Commons
Joseph Williamson, author. Long, Short and Harmon (Portland, ME), publisher. - Public Domain
Crosby, William George, 1805-1881
Image from Wikimedia Commons
Jean Auguste Dominique Ingres - Public Domain
Gatteaux, Nicolas-Marie, 1751-1832
Image from Wikimedia Commons
Strasser, Otto, 1897-1974
Image from Wikimedia Commons
Franzén, Frans Michael, 1772-1847
Image from Wikimedia Commons
Georges Biard - CC BY-SA 3.0
Marchand, Guy, 1937-....
Image from Wikimedia Commons
Bell, William N. (William Nathaniel), 1817-1887
Image from Wikimedia Commons
unknown - Public Domain
Yell, Archibald, 1797 or 1799-1847
Image from Wikimedia Commons
Fuzheado - CC BY-SA 4.0
National Museum of African American History and Culture (U.S.)
Image from Wikimedia Commons
Not listed - Public Domain
Richardson, James D. (James Daniel), 1843-1914
Image from Wikimedia Commons
Unnamed photographer for Bain News Service - Public Domain
Pinchot, Amos, 1873-1944
Image from Wikimedia Commons
Vargas, Fred
Image from Wikimedia Commons
Bob Sindel - CC BY 3.0
Chernoff, Maxine, 1952-
Image from Wikimedia Commons
Not stated - Public Domain
Grinnell, George Bird, 1849-1938
Image from Wikimedia Commons
Peck, Jesse T. (Jesse Truesdell), 1811-1883
Image from Wikimedia Commons
Titanium97 - CC BY-SA 3.0
Annamācārya, 1408-1503
Image from Wikimedia Commons
Artist unidentified - Public Domain
Willson, Forceythe, 1837-1867
Image from Wikimedia Commons
Volberg - CC BY-SA 3.0
McLellan, David.