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Mauritsvink - Public Domain
Juhan Sonin -
gdcgraphics at https://www.flickr.com/photos/gdcgraphics/ -
W. F. Anderson - Public Domain
Stevan Kragujević - CC BY-SA 3.0
Nicolas Habert (graveur) + BastienM - CC BY-SA 3.0
David Starr Jordan (1851-1931) - Public Domain
unknown. Original uploader was :de:DALIBRI - Public Domain
Максим Мальков - CC BY-SA 4.0
Harris & Ewing, photographer - Public Domain
United Nations Development Programme - CC BY 2.0
painting: Master of Frankfurt; original 15th century frame: unknown; photograph: Stomme - Public Domain
Harris & Ewing - Public Domain
General Artists Corporation-GAC. Photographer-Bruno of Hollywood. - Public Domain
unknown - Public Domain
nach einem Gemälde, herausgegeben von Friedrich Bruckmann Verlag München & London. - Public Domain
Marion, Ohio public schools - Public Domain
not identified - Public Domain
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Herzog, Herman, 1831-1932
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Mauritsvink - Public Domain
Thijn, Ed van
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Juhan Sonin -
Topol, Eric J., 1954-....
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Smyth, James Carmichael, 1741-1821
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gdcgraphics at https://www.flickr.com/photos/gdcgraphics/ -
Purefoy, James, 1964-....
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W. F. Anderson - Public Domain
Crooks, George R. (George Richard), 1822-1897
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Stevan Kragujević - CC BY-SA 3.0
Philipe, Gérard, 1922-1959
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Odoacer, approximately 433-493
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Nicolas Habert (graveur) + BastienM - CC BY-SA 3.0
Caulet, François Etienne de 1610-1680
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David Starr Jordan (1851-1931) - Public Domain
Stillman, John Maxson, 1852-1923
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unknown. Original uploader was :de:DALIBRI - Public Domain
Petrejus, Johannes, 1497-1550
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Максим Мальков - CC BY-SA 4.0
Savarese, Ugo
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Harris & Ewing, photographer - Public Domain
Dyer, Leonidas Carstarphen, 1871-1957
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United Nations Development Programme - CC BY 2.0
Clark, Helen, 1950-....
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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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Joslin, Elliott P., 1869-1962
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Benjamin, Park, 1809-1864
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Abel-Smith, Brian, 1926-1996
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Ewart, J. C. (James Cossar), 1851-1933
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Harris & Ewing - Public Domain
Ross, Charles G. (Charles Griffith), 1885-1950
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Park, Roswell, 1852-1914
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General Artists Corporation-GAC. Photographer-Bruno of Hollywood. - Public Domain
Poston, Tom
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Kiess, Carl Clarence
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unknown - Public Domain
Ricordi, Giovanni, -1853
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nach einem Gemälde, herausgegeben von Friedrich Bruckmann Verlag München & London. - Public Domain
Geibel, Emanuel, 1815-1884
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Marion, Ohio public schools - Public Domain
McNay, Marion Koogler
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Andrews, Mark, 1926-
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not identified - Public Domain
Bavin, Thomas, Sir, 1874-
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Brisson, Barnabé, 1531-1591
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unknown - Public Domain
Muspratt, Sheridan, 1821-1871