Image from Wikimedia Commons
Lucas Kilian - Public Domain
unknown - Public Domain
Various - Public Domain
[n.d.] - Public Domain
Lysippos - Public Domain
Civil War Photograph Collection, Library of Congress - Public Domain
Original uploader was Odysses - CC BY-SA 3.0
Frédéric Boissonnas - Public Domain
Billmckern - CC BY-SA 4.0
Public Domain
No photographer credited in original source. - Public Domain
Image from Wikimedia Commons
Serrano, Emilio, 1850-1939
Image from Wikimedia Commons
Lucas Kilian - Public Domain
Leslie, Walter von 1607-1667
Image from Wikimedia Commons
Murray, Robert Maynard, 1841-1913
Image from Wikimedia Commons
Barratier, Christophe
Image from Wikimedia Commons
Ferdinando I, Grand-Duke of Tuscany, 1549-1609
Image from Wikimedia Commons
Wood, James R. (James Rushmore), 1816-1882
Image from Wikimedia Commons
Zambrowski, Roman, 1909-1977
Image from Wikimedia Commons
Herbert, Hilary A. (Hilary Abner), 1834-1919
Image from Wikimedia Commons
unknown - Public Domain
Stoughton, E. W. (Edwin Wallace), 1818-1882
Image from Wikimedia Commons
Sívori, Eduardo (Argentine painter, 1847-1918)
Image from Wikimedia Commons
Various - Public Domain
Desmond, William, 1878-1949
Image from Wikimedia Commons
[n.d.] - Public Domain
Thom, Cameron Erskine, 1825-1915
Image from Wikimedia Commons
Barkla, C. G. (Charles Glover), 1877-1944
Image from Wikimedia Commons
Förster-Nietzsche, Elisabeth, 1846-1935
Image from Wikimedia Commons
unknown - Public Domain
Loesser, Frank, 1910-1969
Image from Wikimedia Commons
Zakrzewska, Marie E. (Marie Elizabeth), 1829-1902
Image from Wikimedia Commons
Lysippos - Public Domain
Gadolin, Johan, 1760-1852
Image from Wikimedia Commons
Civil War Photograph Collection, Library of Congress - Public Domain
Hatch, Edward, 1832-1889
Image from Wikimedia Commons
Himmler, Heinrich, 1900-1945
Image from Wikimedia Commons
Original uploader was Odysses - CC BY-SA 3.0
Democritus, approximately 460 B.C.-approximately 370 B.C.
Image from Wikimedia Commons
Padilla, Alex, 1973-
Image from Wikimedia Commons
Frédéric Boissonnas - Public Domain
Maurras, Charles, 1868-1952
Image from Wikimedia Commons
Beamont, William, 1797?-1889
Image from Wikimedia Commons
Van Rensselaer, Cortlandt, 1808-1860
Image from Wikimedia Commons
Billmckern - CC BY-SA 4.0
Colglazier, Robert W. (Robert Wesley), 1904-1993
Image from Wikimedia Commons
unknown - Public Domain
Gill, William Wyatt, 1828-1896
Image from Wikimedia Commons
Grundy, Felix, 1777-1840
Image from Wikimedia Commons
Public Domain
Kester, Vaughan, 1869-1911
Image from Wikimedia Commons
unknown - Public Domain
Barrett, William, Sir, 1844-1925
Image from Wikimedia Commons
No photographer credited in original source. - Public Domain
Ivogün, Maria, 1891-1987