Image from Wikimedia Commons
Dominick D - CC BY-SA 2.0
Public Domain
unknown - Public Domain
user at project - Public Domain
National Photo Company Collection (Library of Congress) - Public Domain
Henry Hudson, after George Romney - Public Domain
Imoisset - CC BY-SA 4.0
From an unknown painting - Public Domain
not stated - Public Domain
Institute for Policy Studies / Jeremy Bigwood - CC BY 2.0
Harold Goff - Public Domain
From a photo CD - Public Domain
Assenmacher - CC BY-SA 3.0
Rob McAlear - Public Domain
user at project - CC0 1.0
Georges Biard - CC BY-SA 3.0
Image from Wikimedia Commons
Dominick D - CC BY-SA 2.0
Pertwee, Sean, 1964-
Image from Wikimedia Commons
Public Domain
Kelly, John, 1821-1886
Image from Wikimedia Commons
Philips, John, 1676-1709
Image from Wikimedia Commons
unknown - Public Domain
Calvin, Jean, 1509-1564
Image from Wikimedia Commons
Cruz, Celia
Image from Wikimedia Commons
user at project - Public Domain
Brooks, Harvey, 1944-
Image from Wikimedia Commons
National Photo Company Collection (Library of Congress) - Public Domain
Egan, Maurice Francis, 1852-1924
Image from Wikimedia Commons
Henry Hudson, after George Romney - Public Domain
Henniker, John Henniker-Major, Baron, 1752-1821
Image from Wikimedia Commons
Leib, Michael, 1761-1822
Image from Wikimedia Commons
Fowler, Charles Henry, 1837-1908
Image from Wikimedia Commons
Imoisset - CC BY-SA 4.0
Torre, Susana, 1944-
Image from Wikimedia Commons
From an unknown painting - Public Domain
Creighton, William, 1778-1851
Image from Wikimedia Commons
Frank, Johann Peter, 1745-1821
Image from Wikimedia Commons
unknown - Public Domain
Mason, R. B. (Roswell B.), 1805-1892
Image from Wikimedia Commons
Zewail, Ahmed H.
Image from Wikimedia Commons
Post, Regis Henri, 1870-1944
Image from Wikimedia Commons
not stated - Public Domain
Howard, Blanche Willis, 1847-1898
Image from Wikimedia Commons
Gregorovius, Ferdinand, 1821-1891
Image from Wikimedia Commons
Institute for Policy Studies / Jeremy Bigwood - CC BY 2.0
Raskin, Marcus G.
Image from Wikimedia Commons
Harold Goff - Public Domain
Fairbanks, Avard T. (Avard Tennyson), 1897-1987
Image from Wikimedia Commons
From a photo CD - Public Domain
Day, Stephen, 1965-...
Image from Wikimedia Commons
Assenmacher - CC BY-SA 3.0
Yun, Isang
Image from Wikimedia Commons
Alvarado, Juan Bautista, 1809-1882
Image from Wikimedia Commons
Dana, Samuel, 1767-1835
Image from Wikimedia Commons
Dowson, Ernest Christopher, 1867-1900
Image from Wikimedia Commons
unknown - Public Domain
Schuré, Édouard, 1841-1929
Image from Wikimedia Commons
Rob McAlear - Public Domain
Forsyth, Malcolm
Image from Wikimedia Commons
Darboux, Gaston, 1842-1917
Image from Wikimedia Commons
user at project - CC0 1.0
Cobbe, Charles, 1687-1765
Image from Wikimedia Commons
Georges Biard - CC BY-SA 3.0
Delon, Alain, 1935-....