Image from Wikimedia Commons
Rpdieringer - CC BY-SA 3.0
unknown - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
Not provided - Public Domain
Various. No photo credit - Public Domain
original uploader - Public Domain
Y0rx - Public Domain
unknown photographer - CC BY-SA 3.0
Gage Skidmore - CC BY-SA 3.0
Tappan Adney - Public Domain
Engraved by H.B. Hall from a daguerreotype - Public Domain
Image from Wikimedia Commons
Stinson, Katherine, 1891-1977
Image from Wikimedia Commons
Caterina Cornaro, Queen of Cyprus, 1454-1510
Image from Wikimedia Commons
Gluck, Christoph Willibald, 1714-1787
Image from Wikimedia Commons
Rpdieringer - CC BY-SA 3.0
Mosbacher, Dee
Image from Wikimedia Commons
Korboński, Stefan
Image from Wikimedia Commons
Ney, Elisabet, 1833-1907
Image from Wikimedia Commons
Parker, Hyde, 1739-1807
Image from Wikimedia Commons
unknown - Public Domain
Nevskiĭ, Nikolaĭ Aleksandrovich, 1892-1938
Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Ransom, Matt W. (Matt Whitaker), 1826-1904
Image from Wikimedia Commons
Guzmán, Nuño de
Image from Wikimedia Commons
unknown - Public Domain
Stanton, Richard H. (Richard Henry), 1812-1891
Image from Wikimedia Commons
Liu, Shaoqi, 1898-1969
Image from Wikimedia Commons
Demarczyk, Ewa
Image from Wikimedia Commons
Kravis, Henry
Image from Wikimedia Commons
Not provided - Public Domain
Baranov, Aleksandr Andreevich, 1745-1819
Image from Wikimedia Commons
Various. No photo credit - Public Domain
Modjeska, Helena, 1840-1909
Image from Wikimedia Commons
original uploader - Public Domain
Hueffer, Oliver Madox, 1877-1931
Image from Wikimedia Commons
Hogg, Ima
Image from Wikimedia Commons
Hooper, Samuel, 1808-1875
Image from Wikimedia Commons
Vieuxtemps, Henri, 1820-1881
Image from Wikimedia Commons
Mörike, Eduard, 1804-1875
Image from Wikimedia Commons
Y0rx - Public Domain
Motolinía, Toribio, -1568
Image from Wikimedia Commons
Boland, Patrick Joseph, 1880-1942
Image from Wikimedia Commons
Fredericks, John Donnan, 1869-1945
Image from Wikimedia Commons
unknown photographer - CC BY-SA 3.0
Duyvendak, J.J.L. (Jan Julius Lodewijk), 1889-1954
Image from Wikimedia Commons
Gage Skidmore - CC BY-SA 3.0
Ashby, Linden
Image from Wikimedia Commons
Tappan Adney - Public Domain
Adney, Tappan, 1868-1950
Image from Wikimedia Commons
Inge, William
Image from Wikimedia Commons
Crabb, Lionel, 1909-
Image from Wikimedia Commons
Engraved by H.B. Hall from a daguerreotype - Public Domain
Brigham, Amariah, 1798-1849