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painting: Master of Frankfurt; original 15th century frame: unknown; photograph: Stomme - Public Domain
Anonymous - National Gallery of Canada, Library and Archives, Fonds Max Stern - Public Domain
Mike Lewis - CC BY 2.0
Peterson, Harry C. - Public Domain
unknown - Public Domain
Denverkevinl - CC BY 3.0
The Govle - Public Domain
unknown - CC BY-SA 3.0
P.W. Joyce, LL.D. (1900)<br/> - Public Domain
Brady-Handy Photograph Collection (Library of Congress) - Public Domain
Mathew Brady - Public Domain
Alexei Kouprianov - CC BY 3.0
Sherman & McHugh - Public Domain
Taghkanic - CC BY-SA 3.0
Public Domain
National Endowment for the Arts - Public Domain
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Domenichi, Lodovico, 1515-1564
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painting: Master of Frankfurt; original 15th century frame: unknown; photograph: Stomme - Public Domain
Meister von Frankfurt, 1460-
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Todd, David P. (David Peck), 1855-1939
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Anonymous - National Gallery of Canada, Library and Archives, Fonds Max Stern - Public Domain
Stern, Max, 1904-1987
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Mike Lewis - CC BY 2.0
Hensley, John, 1977-...
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Peterson, Harry C. - Public Domain
Sutter, John Augustus, 1826-1897
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unknown - Public Domain
Nervi, Pier Luigi
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Sun, Liren, 1900-1990
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Grey, Beryl, 1927-
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Peixoto, Floriano, 1839-1895
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Davis, William H. (William Hammatt), 1879-1964
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Denverkevinl - CC BY 3.0
Liebman, Marvin
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The Govle - Public Domain
Aldrich, Lucy T. (Lucy Truman), 1869-1955
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unknown - CC BY-SA 3.0
Michelet, Simon Temstrup, 1863-1942
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P.W. Joyce, LL.D. (1900)<br/> - Public Domain
Nulty, Thomas, 1818-1898
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Brady-Handy Photograph Collection (Library of Congress) - Public Domain
Eaton, Amos Beebe, 1806-1877
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Szulkin, Piotr, 1950-...
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Mathew Brady - Public Domain
Grinnell, Josiah Bushnell, 1821-1891
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Gutiérrez Solana, José, 1886-1945
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Alexei Kouprianov - CC BY 3.0
Schaffer, Simon, 1955-....
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Sherman & McHugh - Public Domain
Storrs, Richard S. (Richard Salter), 1821-1900
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Rabasa, Emilio, 1856-1930
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Taghkanic - CC BY-SA 3.0
Berger, Maurice, 1956-....
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Hynek, J. Allen (Joseph Allen), 1910-1986
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Lasker, Eduard, 1829-1884
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unknown - Public Domain
Sauzay, Eugène, 1809-1901
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Public Domain
Nelson, Gaylord Anton, 1916-2005
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National Endowment for the Arts - Public Domain
Ward, Robert, 1917-2013
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unknown - Public Domain
Ferrándiz y Badens, Bernardo, 1835-1885
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Ancillon, Charles, 1659-1715