Image from Wikimedia Commons
Perry, William Stevens - Public Domain
*:File:Saul_Lieberman.jpg - CC BY 3.0
NASA and John Bedke (STScI) - Public Domain
unknown - Public Domain
unknouwn - Public Domain
James Hopwood (1795-1855) - Public Domain
Joseph Kriehuber - Public Domain
Stuart Crawford - CC BY-SA 3.0
Mojmier, L.A. - Public Domain
U.S. Government Printing Office. - Public Domain
Stummfilmverlag - CC BY-SA 4.0
unknown photographer - Public Domain
not stated - Public Domain
Image from Wikimedia Commons
Perry, William Stevens - Public Domain
Onderdonk, Henry U. (Henry Ustick), 1789-1858
Image from Wikimedia Commons
Fréart, Roland, sieur de Chambray, 1606-1676
Image from Wikimedia Commons
*:File:Saul_Lieberman.jpg - CC BY 3.0
Lieberman, Saul, 1898-1983
Image from Wikimedia Commons
Kidd, Isaac C. (Isaac Campbell), 1884-1941
Image from Wikimedia Commons
NASA and John Bedke (STScI) - Public Domain
Doxsey, R. (Rodger)
Image from Wikimedia Commons
unknown - Public Domain
Davis, Varina, 1826-1906
Image from Wikimedia Commons
unknouwn - Public Domain
Shinmura, Izuru, 1876-1967
Image from Wikimedia Commons
James Hopwood (1795-1855) - Public Domain
Słowacki, Juliusz, 1809-1849
Image from Wikimedia Commons
Kable, Henry, 1763-1846
Image from Wikimedia Commons
Saville-Kent, William, 1845-1908
Image from Wikimedia Commons
Merritt, William Hamilton, 1793-1862
Image from Wikimedia Commons
O'Daniel, John W. (John Wilson), 1894-1975
Image from Wikimedia Commons
unknown - Public Domain
Bettinelli, Bruno
Image from Wikimedia Commons
Joseph Kriehuber - Public Domain
Briccialdi, Giulio, 1818-1881
Image from Wikimedia Commons
Gutiérrez Nájera, Manuel, 1859-1895
Image from Wikimedia Commons
Katsushika, Hokusai, 1760-1849
Image from Wikimedia Commons
Gifford, Andrew, 1700-1784
Image from Wikimedia Commons
unknown - Public Domain
Chamfort, Sébastien-Roch-Nicolas, 1740?-1794
Image from Wikimedia Commons
Stuart Crawford - CC BY-SA 3.0
Connery, Sean
Image from Wikimedia Commons
Mojmier, L.A. - Public Domain
Gallagher, Ray, 1885-1953
Image from Wikimedia Commons
U.S. Government Printing Office. - Public Domain
Allen, Amos L. (Amos Lawrence), 1837-1911
Image from Wikimedia Commons
Lecourbe, Claude-Jacques, 1759-1815
Image from Wikimedia Commons
Dávila, Carlos G., 1887-1955
Image from Wikimedia Commons
Winner, Michael
Image from Wikimedia Commons
Stummfilmverlag - CC BY-SA 4.0
Brock, Timothy
Image from Wikimedia Commons
Bloody Knife, approximately 1840-1876
Image from Wikimedia Commons
unknown photographer - Public Domain
Heine, Frederick Wilhelm, 1845-1921
Image from Wikimedia Commons
Portocarrero, Joaquin de 1681-1760
Image from Wikimedia Commons
Kōtoku, Shūsui, 1871-1911
Image from Wikimedia Commons
not stated - Public Domain
Copeland, Charles Townsend, 1860-1952