Image from Wikimedia Commons
unknown - Public Domain
Abraham de Vries - Public Domain
Egon Eagle - CC BY-SA 4.0
Historic and Public Figures Collection - Public Domain
Justus Nussbaum - CC BY-SA 3.0
William Farley Peck, editor. Boston History Company, publisher. - Public Domain
Duncan Campbell Scott - no image credit - Public Domain
Mathew Brady - Public Domain
Tom Marcello, https://www.flickr.com/photos/tommarcello/ - CC BY-SA 2.0
Barovold - CC BY-SA 3.0
Rob McAlear - Public Domain
Georges Biard - CC BY-SA 3.0
David Allan - Public Domain
user at project - CC BY-SA 3.0
(...) Punt / Anefo -
US Government - Public Domain
Image from Wikimedia Commons
unknown - Public Domain
Pfeiffer, Ludwig Georg Karl, 1805-1877
Image from Wikimedia Commons
Abraham de Vries - Public Domain
Vos, Simon de 1603-1676
Image from Wikimedia Commons
Benavente, Saulo
Image from Wikimedia Commons
Egon Eagle - CC BY-SA 4.0
Wells, Vernon, 1945-
Image from Wikimedia Commons
Affleck, Ben, 1972-....
Image from Wikimedia Commons
Historic and Public Figures Collection - Public Domain
Doudney, Sarah, 1843-1926
Image from Wikimedia Commons
Justus Nussbaum - CC BY-SA 3.0
Savage, Jon
Image from Wikimedia Commons
William Farley Peck, editor. Boston History Company, publisher. - Public Domain
Raines, Thomas
Image from Wikimedia Commons
Buffon, Georges-Louis Leclerc, comte de, 1707-1788
Image from Wikimedia Commons
Racah, G. (Giulio), 1909-1965
Image from Wikimedia Commons
Bean, Tarleton H. (Tarleton Hoffman), 1846-1916
Image from Wikimedia Commons
Duncan Campbell Scott - no image credit - Public Domain
Scott, Duncan Campbell, 1862-1947
Image from Wikimedia Commons
Hutto, J. B.
Image from Wikimedia Commons
Mathew Brady - Public Domain
Morrill, Justin S. (Justin Smith), 1810-1898
Image from Wikimedia Commons
Otto, John C. (John Conrad), 1774-1844
Image from Wikimedia Commons
Tom Marcello, https://www.flickr.com/photos/tommarcello/ - CC BY-SA 2.0
Jones, Rodney, 1956-
Image from Wikimedia Commons
Bryant, Charles, 1879-1948
Image from Wikimedia Commons
unknown - Public Domain
French, George Arthur, 1841-1921
Image from Wikimedia Commons
Honecker, Erich
Image from Wikimedia Commons
Elliott, Charles Loring, 1812-1868
Image from Wikimedia Commons
unknown - Public Domain
Kahnis, Karl Friedr. Aug. (Karl Friedrich August), 1814-1888
Image from Wikimedia Commons
Barovold - CC BY-SA 3.0
Innes, C. A. (Charles Alexander), 1874-1959
Image from Wikimedia Commons
Rob McAlear - Public Domain
Priestman, Brian
Image from Wikimedia Commons
Georges Biard - CC BY-SA 3.0
Ascaride, Ariane, 1954-....
Image from Wikimedia Commons
David Allan - Public Domain
Craig, James, -1795
Image from Wikimedia Commons
user at project - CC BY-SA 3.0
Amiran Pougatchov, Emanuel, 1909-1993
Image from Wikimedia Commons
(...) Punt / Anefo -
Oltmans, Willem L.
Image from Wikimedia Commons
Vermeer, Johannes, 1632-1675
Image from Wikimedia Commons
McLaughlin, James W., 1834-1923
Image from Wikimedia Commons
US Government - Public Domain
Bean, L. L. (Leon Leonwood), 1872-1966