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unknown - Public Domain
John P. Quilley, published by Sampson Low, published by and after William Brough - Public Domain
Public Domain
Anefo - CC0 1.0
ABC Network - Public Domain
L. T. Meade - no photo credit. Hurst & Company Publishers - Public Domain
Serotta07 - CC BY-SA 3.0
Le Professeur Pasteur Vallery-Radot - Paris médical : la semaine du clinicien - CC0 1.0
(To be confirmed/sehr unsicher:) Hans Schickhardt (1512-1585) - Public Domain
Contemporary photograph - Public Domain
Greg Hernandez at https://www.flickr.com/photos/greginhollywood/ - CC BY 2.0
Jacques Le Boucq - Public Domain
Jeangagnon - CC BY-SA 3.0
National Lead Company - Public Domain
Oscarfan - Public Domain
Marta Evry - CC BY-SA 2.0
Image from Wikimedia Commons
unknown - Public Domain
Dent, Edward John, 1790-1853
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unknown - Public Domain
Wilcox, Ansley, 1856-1930
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John P. Quilley, published by Sampson Low, published by and after William Brough - Public Domain
Hewlett, John, 1762-1844
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Cunanan, Andrew, 1969-1997
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Campbell, R. J. (Reginald John), 1867-1956
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unknown - Public Domain
Sibal, Abner Woodruff, 1921-2000
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Public Domain
Fisk, James, 1763-1844
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Anefo - CC0 1.0
McLean, Franklin C. (Franklin Chambers), 1888-
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ABC Network - Public Domain
Freeman, Al
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L. T. Meade - no photo credit. Hurst & Company Publishers - Public Domain
Meade, L. T., 1854-1914
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Fitz-Patrick, William J. (William John), 1830-1895
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Cochran, John Joseph, 1880-1947
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unknown - Public Domain
Caumont, A. de (Arcisse), 1802-1873
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Serotta07 - CC BY-SA 3.0
Obata, Gyo, 1923-...
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Obolensky, Serge
Image from Wikimedia Commons
Le Professeur Pasteur Vallery-Radot - Paris médical : la semaine du clinicien - CC0 1.0
Vallery-Radot, Pasteur, 1886-1970
Image from Wikimedia Commons
(To be confirmed/sehr unsicher:) Hans Schickhardt (1512-1585) - Public Domain
Schegk, Jakob, 1511-1587
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Contemporary photograph - Public Domain
Bavinck, Herman, 1854-1921
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Hardy, Guy Urban, 1872-1947
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Greg Hernandez at https://www.flickr.com/photos/greginhollywood/ - CC BY 2.0
Luft, Lorna
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Kabat, Elvin A. (Elvin Abraham), 1914-2000
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unknown - Public Domain
Chrétien, de Troyes, active 12th century
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Jacques Le Boucq - Public Domain
Commynes, Philippe de, approximately 1447-1511
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Jeangagnon - CC BY-SA 3.0
Riopelle, Jean-Paul
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Bilguer, Paul Rudolph von, 1815-1840
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National Lead Company - Public Domain
Earle, Lawrence C. (Lawrence Carmichael), 1845-1921
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Oscarfan - Public Domain
Collins, Max Allan
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Marta Evry - CC BY-SA 2.0
Bowman, Rob
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Bergen, Edgar, 1903-1978
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Davey, Martin L. (Martin Luther), 1884-1946