L'éclipse de lune de Christophe Colomb — Columbus awes the Jamaican natives by predicting the lunar eclipse of 1504
Photo Credit: By Camille Flammarion - Astronomie Populaire 1879, p231 fig. 86, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3613218

Abraham ben Schmuel Zacuth —
Photo Credit: Von Eulogia Merle - Fundación Española para la Ciencia y la Tecnología, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=37026904

Vasco da Gama — Portrait of a Knight Templar says Portrait of Vasco da Gama
Photo Credit: By Unknown master of the Portuguese School.. - Own work - Daniel Villafruela - 17 September 2014, Public Domain, https://commons.wikimedia.org/w/index.php?curid=38093477

Diaz on his Voyage to the Cape — 1887 illustration of Bartolomeu Dias' two caravels: The São Cristóvão and the São Pantaleão.
Photo Credit: By Frederick Whymper - Public Domain, https://commons.wikimedia.org/w/index.php?curid=41115795

Bartolomeu Dias — cropped from photo of Statue of Bartolomeu Dias at the High Commission of South Africa in London
Photo Credit: By Bartolomeu_Dias,_South_Africa_House.JPG: RedCoat (en:User:RedCoat10)derivative work: Biser Todorov (talk) - Bartolomeu_Dias,_South_Africa_House.JPG, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7586424

Death of Columbus — lithograph by L. Prang & Co., 1893
Photo Credit: By L. Prang & Co. - http://www.loc.gov/pictures/resource/cph.3b49586/http://nobility.org/2011/10/10/admiral-knighted-duke-of-veraguas/, Public Domain, https://commons.wikimedia.org/w/index.php?curid=17318822

Landing of Columbus (12 October 1492) — Columbus raises the royal banner of Isabella and Ferdinand on the island he was to name San Salvador
Photo Credit: By John Vanderlyn - Architect of the Capitol, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1380997By John Vanderlyn - Architect of the Capitol, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1380997

Niña, Pinta, & Santa Maria — Replicas of the Caravels Pinta, Niña and the carrack Santa Maria. Lying in the North River, New York. The two caravels and the carrack which crossed from Spain to be present at the World's Fair at Chicago in 1893 to celebrate the 400th anniversary of Christopher Columbus's arrival in the New World
Photo Credit: By E. Benjamin Andrews - Andrews, E. Benjamin. History of the United States, volume V. Charles Scribner's Sons, New York. 1912., Public Domain, https://commons.wikimedia.org/w/index.php?curid=1718649

Christopher Columbus — Cropped from photo (by historian Manuel Rosa) of the painting "The Virgin of the Navigators", 1531–36 by Alejo Fernández (1475-1545) - Photo .
Photo Credit: By Alejo Fernández (1475-1545) - Photo by historian Manuel Rosa., Public Domain, https://commons.wikimedia.org/w/index.php?curid=551286

Thomas Jefferson 1786 — Portrait of Thomas Jefferson while in London in 1786 by Mather Brown
Photo Credit: By 0AH-YSsKF68M1Q at Google Cultural Institute maximum zoom level, Public Domain, https://commons.wikimedia.org/w/index.php?curid=21870366

Andrew Jackson — Engraving of Jackson from the $20 bill Federal Reserve Note. Issue 2006
Photo Credit: a work of the United States government, is ineligible for US copyright, and is therefore in the public domain in the United States.