Image from Wikimedia Commons
unknown - Public Domain
US gov - Public Domain
Winthrop Chandler - Public Domain
Koester, New York. - Public Domain
original uploader - Public Domain
Mathew Brady or Levin Handy - Public Domain
Republic of the Congo, Ministry of Information - Public Domain
U.S. Navy - Public Domain
BobDooney - CC BY-SA 3.0
not stated - Public Domain
Image from Wikimedia Commons
Brook, Timothy, 1951-....
Image from Wikimedia Commons
Ives, Halsey Cooley, 1847-1911
Image from Wikimedia Commons
unknown - Public Domain
Ceccherini, Santi, 1863-1932
Image from Wikimedia Commons
Price, M. Elizabeth (Mary Elizabeth), 1877-1965
Image from Wikimedia Commons
Donath, Ludwig, 1900-1967
Image from Wikimedia Commons
US gov - Public Domain
Nicholson, A. O. P. (Alfred Osborn Pope), 1808-1876
Image from Wikimedia Commons
Salvandy, N.A. de (Narcisse Achille), 1795-1856
Image from Wikimedia Commons
Winthrop Chandler - Public Domain
Chandler, Winthrop, 1747-1790
Image from Wikimedia Commons
Fletcher, John, 1729-1785
Image from Wikimedia Commons
Koester, New York. - Public Domain
Kelley, James T., 1854-1933
Image from Wikimedia Commons
Carrera, Pietro, 1571-1647
Image from Wikimedia Commons
Taillevent, approximately 1315-1395
Image from Wikimedia Commons
MontreĢsor, John, 1736-1799
Image from Wikimedia Commons
Gordigiani, Michele, 1835-1909
Image from Wikimedia Commons
original uploader - Public Domain
Devonshire, William Cavendish, Duke of, 1720-1764
Image from Wikimedia Commons
Skylar, Sunny, 1913-2009
Image from Wikimedia Commons
Mathew Brady or Levin Handy - Public Domain
Henderson, John B. (John Brooks), 1826-1913
Image from Wikimedia Commons
Beurnonville, Pierre Riel, marquis de, 1752-1821
Image from Wikimedia Commons
Pico della Mirandola, Giovanni Francesco, 1470-1533
Image from Wikimedia Commons
Gastrell, Francis, 1662-1725
Image from Wikimedia Commons
San Nicolas, Michael, 1981-
Image from Wikimedia Commons
Republic of the Congo, Ministry of Information - Public Domain
Youlou, Fulbert, 1917-1972
Image from Wikimedia Commons
Schell, Jonathan, 1943-2014
Image from Wikimedia Commons
U.S. Navy - Public Domain
Doyen (Destroyer)
Image from Wikimedia Commons
Stossel, Ludwig
Image from Wikimedia Commons
Landau, L. D. (Lev Davidovich), 1908-1968
Image from Wikimedia Commons
BobDooney - CC BY-SA 3.0
Jones, John Marshall, 1962-
Image from Wikimedia Commons
not stated - Public Domain
Bynner, Witter, 1881-1968
Image from Wikimedia Commons
Proudhon, P.-J. (Pierre-Joseph), 1809-1865
Image from Wikimedia Commons
unknown - Public Domain
Goldman, Marcus, 1821-1904