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TonyTheTiger - CC BY-SA 2.5
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Stephen Pearce - Public Domain
Alexander Sutherland (book author) - Public Domain
William S. Tyler. - Public Domain
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Unknown (photo) / R. Mathis (scan) - Public Domain
unknown - Public Domain
original uploader - Public Domain
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CISV - CC BY 3.0
Painted by T. Beach Engraved by P. Roberts - Public Domain
Mathew Brady - Public Domain
Robert Duddingstone Herdman - Public Domain
Media Expres - CC BY 3.0
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Housman, Arthur, 1890-1942
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Eva Rinaldi - CC BY-SA 2.0
Zambello, Francesca
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Deakin, Alfred, 1856-1919
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Amboise, Georges d' 1460-1510
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Van Dyke, Carl C. (Carl Chester), 1881-1919
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Somerville, Mary, 1780-1872
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Starcke, Carl Nicolai, 1858-1926
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TonyTheTiger - CC BY-SA 2.5
William W. Kimball House (Chicago, Ill.)
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GFHund - CC BY 3.0
London, Fritz, 1900-1954
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Stephen, Ninian, Sir, 1923-
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Stephen Pearce - Public Domain
McCormick, R. M. (Robert M.), 1800-1890
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Alexander Sutherland (book author) - Public Domain
Hagenauer, F. A. (Frederick August), 1829-1909
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William S. Tyler. - Public Domain
Hitchcock, Edward, 1793-1864
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Maskelyne, Nevil, 1732-1811
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Cassidy Turner - CC BY-SA 3.0
Hannah, Daryl
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Swarthout, Gladys, 1900-1969
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Rous, Francis, 1579-1659
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Unknown (photo) / R. Mathis (scan) - Public Domain
Giry, Arthur, 1848-1899
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Gegenbaur, C. (Carl), 1826-1903
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unknown - Public Domain
Dolgorukov, Pavel Dmitrīevich, kni︠a︡zʹ, 1866-1927
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Cajetan, Tommaso de Vio, 1469-1534
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Talmage, John Van Nest, 1819-1892
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Porter Hovey at http://www.porterhovey.com/ - CC BY-SA 3.0
Casebere, James
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CISV - CC BY 3.0
Allen, Doris Twitchell, 1901-2002
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Nijinska, Bronislava, 1891-1972
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Painted by T. Beach Engraved by P. Roberts - Public Domain
Pulteney, Richard, 1730-1801
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Mathew Brady - Public Domain
Ellis, E. John (Ezekiel John), 1840-1889
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Argoli, Andrea, 1570-1656
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Robert Duddingstone Herdman - Public Domain
Tuke, J. Batty (John Batty), Sir, 1835-1913
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Nicolaescu, Sergiu, 1930-2013