Image from Wikimedia Commons
original photographer unknown, retouched by Tim Ross - Public Domain
Rudolf Lehmann - Public Domain
Stephencdickson - CC BY-SA 4.0
anonymous -
Sinednov - CC BY-SA 4.0
Erling Mandelmann - CC BY-SA 3.0
United States Congress - Public Domain
Alfred Hudson Guernsey and Henry Mills Alden, authors. McDonnell Bros. (Chicago, IL), publisher. - Public Domain
Georges Seguin (Okki - CC BY-SA 3.0
Bain - Public Domain
Kay Rasmus Nielsen (1886-1957) - Public Domain
unknown - Public Domain
CC BY 3.0
Unknown, possibly a self portrait - Public Domain
Image from Wikimedia Commons
Loeb, William, 1866-1937
Image from Wikimedia Commons
original photographer unknown, retouched by Tim Ross - Public Domain
Loomis, Mahlon, 1826-1886
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Rudolf Lehmann - Public Domain
Lehmann, Rudolf, 1819-1905
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Santa Anna, Antonio López de, 1794?-1876
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Stephencdickson - CC BY-SA 4.0
Johnston, Jas. F. W. (James Finlay Weir), 1796-1855
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Campen, Jacob van 1595-1657
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Israel, Wilfrid
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anonymous -
Döblin, Alfred, 1878-1957
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Sinednov - CC BY-SA 4.0
Friedman, Jerome I. (Jerome Isaac), 1930-
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Turrettini, François, 1623-1687
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Erling Mandelmann - CC BY-SA 3.0
Aron, Raymond, 1905-1983
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Maupeou, René-Nicolas-Charles-Augustin de, 1714-1792
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Raschi, Vic, 1919-1988
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Wiedewelt, Johannes, 1731-1802
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United States Congress - Public Domain
McInnis, Scott, 1953-
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Harrington, William Stanhope, Earl of, approximately 1690-1756
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Stockmar, Christian Friedrich, Freiherr von, 1787-1863
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Alfred Hudson Guernsey and Henry Mills Alden, authors. McDonnell Bros. (Chicago, IL), publisher. - Public Domain
Love, Peter E. (Peter Early), 1818-1866
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Eisenman, Peter, 1932-....
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Georges Seguin (Okki - CC BY-SA 3.0
Valdés, Zoé, 1959-
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Bain - Public Domain
Martin, Anne, 1875-1951
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Mai, Mukhtar
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Della Rovere, Francesco Maria, duca d'Urbino, 1548-1631
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Kay Rasmus Nielsen (1886-1957) - Public Domain
Nielsen, Kay Rasmus, 1886-1957
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González, Pablo, 1879-1950
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Villamena, Francesco, approximately 1566-1624
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unknown - Public Domain
Berling, Zygmunt, 1896-1980
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CC BY 3.0
Gregory, Saint, Bishop of Tours, 538-594
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Unknown, possibly a self portrait - Public Domain
Watson, Edith S., 1861-1943
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Obaldía, José de, 1806-1889