Picture credits

All portraits come from Wikimedia Commons and are in the public domain or available under an open licence. They have been cropped and resized. Spoiler warning: this page names everyone.

Abraham Lincoln: Alexander Gardner, Public domain, source
Ada Lovelace: Antoine Claudet, Public domain, source
Alan Turing: Elliott & Fry, Public domain, source
Albert Einstein: Oren Jack Turner, Public domain, source
Alexander Fleming: Official photographer, Public domain, source
Alexander Graham Bell: Unknown authorUnknown author, CC0, source
Alexander the Great: Unknown authorUnknown author, Public domain, source
Alfred Nobel: Unknown authorUnknown author, Public domain, source
Amelia Earhart: Underwood & Underwood (active 1880 – c. 1950)[1], Public domain, source
Amerigo Vespucci: Crispijn van de Passe the Elder, Public domain, source
Andrew Jackson: Ralph Eleaser Whiteside Earl, Public domain, source
Antonio Vivaldi: Unidentified painter, Public domain, source
Archimedes: Domenico Fetti, Public domain, source
Aristotle: After Lysippos, Public domain, source
Benjamin Franklin: Joseph-Siffred Duplessis, Public domain, source
Blaise Pascal: unknown; a copy of the painting of François II Quesnel, which was made for Gérard Edelinck en 1691[réf. nécessaire]., Public domain, source
Carl Friedrich Gauss: Christian Albrecht Jensen, Public domain, source
Catherine the Great: After Alexander Roslin, Public domain, source
Charlemagne: Albrecht Dürer, Public domain, source
Charles Darwin: Charles_Darwin_seated.jpg: Henry Maull (1829–1914) and John Fox (1832–1907) (Maull & Fox) [3] derivative work: Beao, Public domain, source
Charles de Gaulle: Office of War Information, Overseas Picture Division. [1] The image prefix (LC-USW3) at the Library of Congress image page matches that of p, Public domain, source
Charles Dickens: Jeremiah Gurney, Public domain, source
Christopher Columbus: Sebastiano del Piombo, Public domain, source
Clara Barton: The Library of Congress, No restrictions, source
Claude Monet: Nadar, Public domain, source
Confucius: Unknown, Public domain, source
Dwight D. Eisenhower: White House, Public domain, source
Edgar Allan Poe: Unknown authorUnknown author; Restored by Yann Forget and Adam Cuerden, Public domain, source
Edward Jenner: John Raphael Smith, Public domain, source
Elizabeth Blackwell: Unknown photographer, Public domain, source
Elizabeth I: Unidentified painter, Public domain, source
Emily Carr: Unknown, Public domain, source
Emily Dickinson: Unknown authorUnknown author, Public domain, source
Emmeline Pankhurst: Adam Cuerden, Public domain, source
Ernest Shackleton: George Charles Beresford / Adam Cuerden, Public domain, source
Euclid: Jusepe de Ribera (Spanish / Italian, 1591 - 1652) (1591 - 1652) – artist (Spanish / Italian) Details on Google Art Project, Public domain, source
Ferdinand Magellan: Unknown authorUnknown author, Public domain, source
Florence Nightingale: Henry Hering (1814-1893), Public domain, source
Franklin D. Roosevelt: Leon Perskie, CC BY 2.0, source
Franz Schubert: Wilhelm August Rieder, Public domain, source
Frédéric Chopin: Louis-Auguste Bisson, Public domain, source
Frederick Banting: Louis Schmidt, Public domain, source
Frida Kahlo: Guillermo Kahlo, Public domain, source
Friedrich Nietzsche: Friedrich Hermann Hartmann, Public domain, source
Fyodor Dostoevsky: Vasily Perov, Public domain, source
Galileo Galilei: Justus Sustermans, Public domain, source
Genghis Khan: Unknown authorUnknown author, Public domain, source
George Frideric Handel: Attributed to Balthasar Denner, Public domain, source
George Washington: Gilbert Stuart, Public domain, source
Giuseppe Garibaldi: Fratelli Alinari, Public domain, source
Giuseppe Verdi: Ferdinand Mulnier, Public domain, source
Golda Meir: Willem van de Poll, CC BY-SA 4.0, source
Gottfried Wilhelm Leibniz: Christoph Bernhard Francke, Public domain, source
Gregor Mendel: Unknown authorUnknown author, Public domain, source
Guglielmo Marconi: Pach Brothers, Public domain, source
Harriet Tubman: Powelson, Benjamin F. 1823 - 1885, Public domain, source
Helen Keller: Unknown authorUnknown author, Public domain, source
Henry Ford: Ford Motor Company. Photographic Department, Public domain, source
Henry VIII: Workshop of Hans Holbein the Younger, Public domain, source
Hippocrates: Unidentified engraver, Public domain, source
Ignaz Semmelweis: József Borsos / Albert Doctor, Public domain, source
Immanuel Kant: Johann Gottlieb Becker (1720-1782), Public domain, source
Indira Gandhi: Prime Minister's Office, GODL-India, source
Isaac Brock: John Savery Carey, Public domain, source
Isaac Newton: Godfrey Kneller, Public domain, source
James Cook: Nathaniel Dance-Holland, Public domain, source
James Watt: Carl Frederik von Breda, Public domain, source
Jane Austen: Cassandra Austen, Public domain, source
Jawaharlal Nehru: Harry Pot, CC0, source
Joan of Arc: Unknown, Public domain, source
Johann Sebastian Bach: Elias Gottlob Haussmann, Public domain, source
Johannes Gutenberg: Kenneth C. Zirkel, CC BY-SA 4.0, source
Johannes Kepler: August Köhler [1], Public domain, source
John A. Macdonald: George Lancefield, Public domain, source
John F. Kennedy: Cecil W. Stoughton, Public domain, source
Jonas Salk: SAS Scandinavian Airlines, Public domain, source
Joseph Brant: Gilbert Stuart, Public domain, source
Joseph Lister: Unknown authorUnknown author, Public domain, source
Julius Caesar: Ángel M. Felicísimo from Mérida, España, Public domain, source
Karl Marx: John Jabez Edwin Mayall, Public domain, source
Kwame Nkrumah: The National Archives UK - Flickr account, OGL v1.0, source
Laura Secord: AnonymousUnknown author, Public domain, source
Leo Tolstoy: Sergei Prokudin-Gorskii, Public domain, source
Leonardo da Vinci: Attributed to Francesco Melzi, Public domain, source
Leonhard Euler: Jakob Emanuel Handmann, Public domain, source
Lester B. Pearson: ABC Television, Public domain, source
Louis Pasteur: Paul Nadar, Public domain, source
Louis Riel: Photographer: I. Bennetto & Co. (Israel Bennetto, 1860-1946[2])(possibly) Engraver: Octave-Henri Julien (1852-1908), Public domain, source
Louis XIV: Hyacinthe Rigaud, Public domain, source
Ludwig van Beethoven: Joseph Karl Stieler, Public domain, source
Mahatma Gandhi: Elliott & Fry, Public domain, source
Marco Polo: Unknown, Public domain, source
Marie Curie: Henri Manuel, Public domain, source
Mark Twain: A.F. Bradley, New York, Public domain, source
Martin Luther King Jr.: Associated Press, Public domain, source
Max Planck: Hugo Erfurth, Public domain, source
Michael Faraday: Unknown authorUnknown author, Public domain, source
Michelangelo: Attributed to Daniele da Volterra, Public domain, source
Mustafa Kemal Atatürk: Unknown authorUnknown author, Public domain, source
Napoleon Bonaparte: Jacques-Louis David, Public domain, source
Neil Armstrong: Unknown authorUnknown author, Public domain, source
Nellie McClung: Cyril Jessop, Public domain, source
Nelson Mandela: Kingkongphoto & www.celebrity-photos.com from Laurel, CC BY-SA 2.0, source
Niels Bohr: The American Institute of Physics credits the photo [1] to AB Lagrelius & Westphal, which is the Swedish company used by the Nobel Found, Public domain, source
Nikola Tesla: Napoleon Sarony, Public domain, source
Orville Wright: Orville Wright and Wilbur Wright (credited as photographers) [1], [2], Public domain, source
Oscar Wilde: Napoleon Sarony / Adam Cuerden, Public domain, source
Pablo Picasso: Argentina. Revista Vea y Lea, Public domain, source
Paul Cézanne: Unknown; Cézanne was born in 1839 and died in 1906, Public domain, source
Peter the Great: Attributed to Jean-Marc Nattier, Public domain, source
Pierre de Fermat: Unknown authorUnknown author, Public domain, source
Pierre-Auguste Renoir: UnknownUnknown Musée d'Orsay, Dist. RMN-Grand Palais / Patrice Schmidt, Public domain, source
Plato: Marie-Lan Nguyen, Public domain, source
Pyotr Ilyich Tchaikovsky: Émile Reutlinger, Public domain, source
Pythagoras: Unknown authorUnknown author, Public domain, source
Queen Victoria: Alexander Bassano, Public domain, source
Rabindranath Tagore: Georges Chevalier, CC BY 4.0, source
Raphael: Raphael, Public domain, source
Rembrandt: Rembrandt, Public domain, source
René Descartes: After Frans Hals, Public domain, source
Richard Wagner: Franz Hanfstaengl, Public domain, source
Roald Amundsen: AnonymousUnknown author, Public domain, source
Robert Falcon Scott: Henry Maull (1829–1914) and John Fox (1832–1907), Public domain, source
Robert Koch: Unknown authorUnknown author, Public domain, source
Ronald Reagan: Michael Evans, Public domain, source
Rosa Parks: Unknown authorUnknown author, Public domain, source
Salvador Dalí: Van Vechten, Carl, 1880-1964., Public domain, source
Samuel Morse: Mathew Benjamin Brady, Public domain, source
Sigmund Freud: Max Halberstadt, Public domain, source
Simón Bolívar: Luis Enrique Toro Moreno (1897-1933), Public domain, source
Socrates: Copy of Lysippos (?), Public domain, source
Sojourner Truth: Randall Studio, Public domain, source
Srinivasa Ramanujan: Unknown authorUnknown author, CC BY 4.0, source
Suleiman the Magnificent: Circle of Titian, Public domain, source
Sun Yat-sen: 上海波尔照相馆, Public domain, source
Susan B. Anthony: Unknown authorUnknown author, Public domain, source
Tecumseh: attributed to Owen Staples (1866–1949), based on the engraving published by Benson John Lossing[1], Public domain, source
Theodore Roosevelt: Adam Cuerden, Public domain, source
Thomas Edison: Louis Bachrach, Bachrach Studios, restored by Michel Vuijlsteke, Public domain, source
Thomas Jefferson: Rembrandt Peale, Public domain, source
Ulysses S. Grant: Brady-Handy Photograph Collection, Library of Congress, Public domain, source
Vasco da Gama: Sailko, CC BY 3.0, source
Victor Hugo: Étienne Carjat, Public domain, source
Vincent van Gogh: Vincent van Gogh, Public domain, source
Voltaire: Nicolas de Largillière, CC0, source
Wilfrid Laurier: William James Topley, Public domain, source
William Shakespeare: Attributed to John Taylor, Public domain, source
Winston Churchill: Yousuf Karsh, Public domain, source
Wolfgang Amadeus Mozart: Johann Nepomuk della Croce, Public domain, source
Woodrow Wilson: Harris & Ewing, photographer, Public domain, source