Image from Wikimedia Commons
Thomas A. Edison, Inc. - Public Domain
unknown - Public Domain
CBS Network - Public Domain
Anonymous plate - Public Domain
Public Domain
Mariarita.m86 - CC BY-SA 3.0
"Plattsburgh Sentinel" newspaper. - Public Domain
Ramon Casas -
Philkon - Public Domain
LSE library -
Photo taken by Vesperholly - CC BY-SA 2.5
BRERETON GREENHOUS - Public Domain
unknown, picture taken 1917 - Public Domain
Mr Peefoo - CC BY-SA 4.0
Image from Wikimedia Commons
Thomas A. Edison, Inc. - Public Domain
Sodero, Cesare, 1886-1947
Image from Wikimedia Commons
unknown - Public Domain
Rosselli, Carlo, 1899-1937
Image from Wikimedia Commons
Steptoe, Edward Jenner, 1816-1865
Image from Wikimedia Commons
Gregory XIV, Pope, 1535-1591
Image from Wikimedia Commons
CBS Network - Public Domain
Burkley, Dennis
Image from Wikimedia Commons
Anonymous plate - Public Domain
Łubieński, Stanisław, 1573-1640
Image from Wikimedia Commons
Public Domain
Steunenberg, Frank, 1861-1905
Image from Wikimedia Commons
Gibbons, Orlando, 1583-1625
Image from Wikimedia Commons
Mariarita.m86 - CC BY-SA 3.0
Mainetti, Stefano
Image from Wikimedia Commons
Granvelle, Nicolas Perrenot de 1486-1550
Image from Wikimedia Commons
Koch, Ilse, 1906-1967
Image from Wikimedia Commons
Saint-Lambert, Jean-François, marquis de, 1716-1803
Image from Wikimedia Commons
Torrington, George Byng, Viscount, 1812-1884
Image from Wikimedia Commons
"Plattsburgh Sentinel" newspaper. - Public Domain
Tredwell, Thomas, 1743-1831
Image from Wikimedia Commons
unknown - Public Domain
Morse, Lee, -1954
Image from Wikimedia Commons
Ramon Casas -
Ors, Eugenio d' 1882-1954
Image from Wikimedia Commons
Crawford, Coe Isaac, 1858-1944
Image from Wikimedia Commons
Philkon - Public Domain
Oates, John
Image from Wikimedia Commons
LSE library -
Ginsberg, Morris, 1889-1970
Image from Wikimedia Commons
Bickersteth, Robert, 1816-1884
Image from Wikimedia Commons
Merezhkovsky, Dmitry Sergeyevich, 1865-1941
Image from Wikimedia Commons
Smith, James M. (James Milton), 1823-1890
Image from Wikimedia Commons
Auwers, A. (Arthur), 1838-1915
Image from Wikimedia Commons
Photo taken by Vesperholly - CC BY-SA 2.5
Hughes, Sarah, 1985-
Image from Wikimedia Commons
BRERETON GREENHOUS - Public Domain
Collishaw, Raymond, 1893-1976
Image from Wikimedia Commons
Bland, Nevile, Sir, 1886-
Image from Wikimedia Commons
Mackenzie, James, 1853-1925
Image from Wikimedia Commons
unknown, picture taken 1917 - Public Domain
Boltwood, Bertram Borden, 1870-1927
Image from Wikimedia Commons
Fenn, John B., 1917-2010
Image from Wikimedia Commons
Mr Peefoo - CC BY-SA 4.0
Scott, Beverly Jo 1959-....