Image from Wikimedia Commons
ru - Public Domain
VLL89 KTL - CC BY-SA 3.0
անհայտ - Public Domain
Lisbeth Medbøe Risnes - CC BY-SA 4.0
United States Air Force - Public Domain
George Grantham Bain Collection (Library of Congress) - Public Domain
J.H. Fitzgibbon - CC0 1.0
Contemporary portrait - Public Domain
unknown - Public Domain
UPI Telephoto -
anonymous -
HubertSt - CC BY-SA 4.0
Slowking4 -
Image from Wikimedia Commons
ru - Public Domain
Rumi︠a︡nt︠s︡ev-Zadunaĭskiĭ, Petr Aleksandrovich, graf, 1725-1796
Image from Wikimedia Commons
Rawlings, Margaret, 1906-1996
Image from Wikimedia Commons
Clark, Buddy, 1911-1949
Image from Wikimedia Commons
VLL89 KTL - CC BY-SA 3.0
Buzan, Tony
Image from Wikimedia Commons
Fergusson, James, 1808-1886
Image from Wikimedia Commons
անհայտ - Public Domain
Ibn Ḥanbal, Aḥmad ibn Muḥammad, 780-855
Image from Wikimedia Commons
Lisbeth Medbøe Risnes - CC BY-SA 4.0
Thommessen, Olav Anton, 1946-....
Image from Wikimedia Commons
Sierpiński, Wacław, 1882-1969
Image from Wikimedia Commons
Barros, João de, 1496-1570
Image from Wikimedia Commons
United States Air Force - Public Domain
Quarles, Donald A. (Donald Aubrey), 1894-1959
Image from Wikimedia Commons
Chaussegros de Léry, Gaspard-Joseph 1682-1756
Image from Wikimedia Commons
McKay, Hugh Victor, 1865-1926
Image from Wikimedia Commons
George Grantham Bain Collection (Library of Congress) - Public Domain
Moore, Alexander Pollock, 1867-1930
Image from Wikimedia Commons
J.H. Fitzgibbon - CC0 1.0
Debar, Benedict, 1812-1877
Image from Wikimedia Commons
Bradley, Will, 1868-1962
Image from Wikimedia Commons
Amery, L. S. (Leopold Stennett), 1873-1955
Image from Wikimedia Commons
Brolin, Josh
Image from Wikimedia Commons
Contemporary portrait - Public Domain
Tucker, Henry St. George, 1874-1959
Image from Wikimedia Commons
Reynolds, C. A. (Charles Albert), 1848-1936
Image from Wikimedia Commons
Yergin, Daniel.
Image from Wikimedia Commons
unknown - Public Domain
Farmer, Fannie Merritt, 1857-1915
Image from Wikimedia Commons
UPI Telephoto -
Herndon, Marcia
Image from Wikimedia Commons
unknown - Public Domain
Esmarch, Friedrich von 1823-1908
Image from Wikimedia Commons
anonymous -
Aubert, Louis, 1877-1968
Image from Wikimedia Commons
Barbour, Henry Ellsworth, 1877-1945
Image from Wikimedia Commons
Currie, Donald, 1825-1909
Image from Wikimedia Commons
Galvin, John R., 1929-
Image from Wikimedia Commons
Robbins, Jerome
Image from Wikimedia Commons
HubertSt - CC BY-SA 4.0
Fuchs, Johann Nepomuk von 1774-1856
Image from Wikimedia Commons
Slowking4 -
Strand, Mark, 1934-....