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unknown - Public Domain
Photographer unidentified - Public Domain
Mathew Brady - Public Domain
Jim Reynolds - CC BY 2.0
Secretaría de Cultura CDMX - CC BY-SA 2.0
Kendrick Frazier - CC BY 2.5
United States Congress - Public Domain
DoulosBen - CC BY-SA 4.0
original uploader - Public Domain
Beau Bonetti - CC BY-SA 2.0
Léonard Gaultier (1561-1635) - Public Domain
anonymous/unknown - Public Domain
Harris & Ewing - Public Domain
:en:William Winter (author) - Public Domain
Grb1978 - CC BY-SA 3.0
unknown. Original uploader was Outremer31 - Public Domain
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unknown - Public Domain
Dasburg, Andrew, 1887-1979
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Egmont, John Perceval, Earl of, 1711-1770
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Photographer unidentified - Public Domain
Townsend, Mary Ashley, 1832-1901
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Mathew Brady - Public Domain
Van Winkle, P. G. (Peter Godwin), 1808-1872
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Day, Arthur L. (Arthur Louis), 1869-1960
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Jim Reynolds - CC BY 2.0
Forsythe, William, 1955-
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unknown - Public Domain
Aleotti, Giambattista, 1546-1636
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Secretaría de Cultura CDMX - CC BY-SA 2.0
Pacheco, José Emilio.
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Kendrick Frazier - CC BY 2.5
Frazier, Kendrick.
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United States Congress - Public Domain
Weaver, James H., 1927-
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unknown - Public Domain
Carrà, Carlo, 1881-1966
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DoulosBen - CC BY-SA 4.0
Kinlaw, Dennis F., 1922-
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original uploader - Public Domain
Crosland, T. W. H. (Thomas William Hodgson), 1865-1924
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Beau Bonetti - CC BY-SA 2.0
Marinelli, Anthony, 1959-...
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Léonard Gaultier (1561-1635) - Public Domain
Thou, Christophe de, 1508-1582
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anonymous/unknown - Public Domain
Brusina, Spiridion, 1845-1908
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Harris & Ewing - Public Domain
Berger, Victor L. (Victor Luitpold), 1860-1929
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Barrett, Craig R., 1939-
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Moffatt, John, 1922-2012
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Evans, Robert, 1930-....
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Shipstead, Henrik, 1881-1960
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Smalley, Richard E. 1943-2005
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Bolton, Chester Castle, 1882-1939
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:en:William Winter (author) - Public Domain
O'Brien, Fitz-James, 1828-1862
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Grb1978 - CC BY-SA 3.0
Kessler, David, 1860-1920
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Thompson, William, 1805-1852
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Kent, James, 1763-1847
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Askin, Robert William, Sir, 1909-1981
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Day, Marceline
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unknown. Original uploader was Outremer31 - Public Domain
De Saussure, W. F. (William Ford), 1792-1870