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unknown - Public Domain
Deutsches Historisches Museum - Public Domain
Jopparn - CC BY-SA 3.0
Ron van der Kolk - CC BY 2.5
circa 1888 sketch done for The Biographical Review of Prominent Men and Women of the Day published by W. H. Ives & Co. 1888 - Public Domain
Litho by Alexander Clemens Wetterling (1796-1858) from a picture by Krafft. - Public Domain
Vincenzo Salvato Paliotti (1831-1894) - Public Domain
The Theatre Magazine Co. - Public Domain
Makuck - CC BY 3.0
:de:Benutzer:Tilla - CC BY-SA 3.0
The Granite Monthly magazine - Public Domain
not stated - Public Domain
Georges Biard - CC BY-SA 3.0
Eric Koch / Anefo -
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James, William, 1542-1617
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Schawlow, Arthur L., 1921-1999
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Cooke, Benjamin, 1734-1793
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unknown - Public Domain
Piria, Raffaele, 1815-1865
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Deutsches Historisches Museum - Public Domain
Delbrück, Hans, 1848-1929
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Horsford, Eben Norton, 1818-1893
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Vilčinskis, Jonas Kazimieras, 1806-1885
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D'Arcy, Roy, 1894-1969
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Jopparn - CC BY-SA 3.0
Ostade, Adriaen van 1610-1685
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Ron van der Kolk - CC BY 2.5
Thielemans, Toots
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circa 1888 sketch done for The Biographical Review of Prominent Men and Women of the Day published by W. H. Ives & Co. 1888 - Public Domain
Lorillard, Pierre, 1833-1901
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Litho by Alexander Clemens Wetterling (1796-1858) from a picture by Krafft. - Public Domain
Gyllenhaal, Leonhard 1752-1840
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Benedict XIV, Pope, 1675-1758
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Fong, Hiram, 1906-2004
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Rolfe, Red, 1908-1969
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Deza, Diego de, 1444-1523
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Higashiyama, Kaii, 1908-1999
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Vincenzo Salvato Paliotti (1831-1894) - Public Domain
Manfroce, Nicola Antonio, 1791-1813
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The Theatre Magazine Co. - Public Domain
Bandmann, Daniel Edward, 1840-1905
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Scott, Charles Prestwich, 1846-1932
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unknown - Public Domain
Lewis, Joseph Horace, 1824-1904
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Makuck - CC BY 3.0
Makuck, Peter, 1940-
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:de:Benutzer:Tilla - CC BY-SA 3.0
Karmakar, Romuald, 1965-
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Campeggi, Lorenzo, 1474-1539
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The Granite Monthly magazine - Public Domain
Smith, John Butler, 1838-1914
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not stated - Public Domain
Laestadius, L. L. (Lars Levi), 1800-1861
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Georges Biard - CC BY-SA 3.0
Stallone, Sylvester.
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Peck, Jesse T. (Jesse Truesdell), 1811-1883
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Eric Koch / Anefo -
Isakadze, Liana
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Durham, John George Lambton, Earl of, 1792-1840