Aristotle, Ancient Greek philosopher
Aristotle, ancient Greek philosopher
Lysias, Ancient Greek orator
Pythagoras, Ancient Greek mathematician
Xenocrates, Ancient Greek philosopher
Socrates, Ancient Greek philosopher
Plato, Ancient Greek philosopher
Aristotle,
Anaximander, ancient Greek philosopher
Hippocrates, Ancient Greek physician
Thucydides and Herodotus, Ancient Greek historians
Claude Adrien Helvetius, French philosopher
Carl Ritter, German geographer
Sappho, Ancient Greek poet
Galen, Ancient Greek physician
Thucydides, Ancient Greek historian
Boar hunting in Ancient Greece
Venus and Mars, 19th Century illustration
Gods on Mount Olympus, 19th Century illustration
Friedrich von Schelling, German philosopher
Statue by Praxiteles, 17th century
Thales, Ancient Greek philosopher, illustration
Elie de Beaumont, French geologist
Louis Thenard, French chemist
Carl Merck, German naturalist
Ptolemy, Ancient Greek astronomer
Galen, Ancient Greek physician, illustration
Heinrich Schliemann, German archaeologist
Archilochus of Paros, Ancient Greek poet
アリストテレス
Ptolemy, Greek astronomer, artwork
Ptolemy, Greek astronomer
Pierre-Paul Riquet, French engineer
Tessie du Motay, French chemist
Pierre-Oscar Figuier, French chemist
Johann Kunckel, German chemist
Francois Fenelon, French theologian
Andreas Vesalius, Belgian anatomist
Hercules and the Cercopes, 5th century BC sculpture
Denis Diderot, French encyclopedist
Pliny the Elder, Roman philosopher
Circe, goddess of magic
Martin Lichtenstein, German physician
Ernst Haekel, German naturalist
Bust of Democritus, Greek philosopher, illustration
Arthur Schopenhauer, German philosopher
Albrecht von Haller, Swiss anatomist, illustration
Euclid, Ancient Greek mathematician
David Hume, Scottish philosopher
Ancient Greek warrior
Ancient Greek warriors
Jean-Jacques Rousseau, French philosopher
Bacchus and Ariadne, 19th Century illustration
Voltaire, French author
Charles Sanders Peirce, US philosopher
Ancient Assyrian bas relief, illustration
Franz Achard, German chemist
John Tyndall, Irish physicist
Confucius, Chinese philosopher
Babylonian astronomers
Gottfried Leibniz, German mathematician
Athanasius Kircher, German Jesuit scholar
Xavier Bichat, French anatomist
Isaac Barrow, English mathematician
Johann Kaspar Lavater, Swiss theologist
Blaise Pascal, French mathematician
Rene Descartes, French mathematician
Charles de Freycinet, French statesman
Albrecht Durer, German artist
Emile Flourens, French politician
Frederick William III of Prussia, illustration
Umberto I of Italy, 19th Century illustration
Leopold II, King of Belgium
Pope Leo XIII, 19th Century illustration
Piet Joubert, South African military commander
Chief Badumbe of Ancient Sudan, illustration
Thales, Ancient Greek scientist
Aristophanes, ancient Greek playwright
Ancient Greek warrior, illustration
Georges Leclerc, Comte de Buffon, French Polymath
Christian Ehrenberg, German naturalist
Death of Hypatia, Ancient Greek philosopher, illustration
Charles Darwin, British naturalist
Francis Bacon, English philosopher
Alfred Russel Wallace, British naturalist
Jean-Baptiste Lamarck, French naturalist
Thomas Huxley, English biologist
The Globe of Crates, historical artwork
Karl Popper, Austrian-British philosopher
Comte de Buffon, French naturalist
Michel de Montaigne, French philosopher
Alexander of Macedon and Aristotle
Joseph Lakanal, French politician
Prokop Divis, Czech scientist
Sargon II of Assyria, bas relief
Julius Caesar, Roman statesman, illustration
Hadrian, Roman emperor
Richard Owen, British palaeontologist
19th Century Sardinian women, illustration
Maria Christina, Queen of Spain
Queen Victoria, British monarch
Jean-Daniel Colladon, Swiss physicist
Xavier Marmier, French author, illustration
Theodosius I, Roman Emperor
August Kekule, German chemist
Georg Riemann, German mathematician
Evariste Galois, French mathematician
Salomon de Caus, French engineer
Albrecht Thaer, German agronomist
Jules-Auguste Beclard, French physician
Jean Chaffanjon, French explorer
Andre-Marie Ampere, French physicist
Armand-Pierre Seguier, French lawyer
Pavel Yablochkov, Russian
Gaspare Aselli, Italian surgeon, illustration
Jules Janssen, French astronomer
Leon Foucault, French physicist
Gaspare Aselli, Italian surgeon
Anne Louise Germaine Necker, French writer
Propylaea of the Acropolis, illustration
19th Century Sardinian men, illustration
Georges-Auguste Leschot, French watchmaker
Dmitri Mendeleev, caricature
Ernst Mach, Austrian physicist
Alfred North Whitehead, British mathematician
Johann Ritter, German physicist
Jules Verne, French author, 20th C illustration
Hipparchus, Ancient Greek astronomer
19th Century King of Siam, illustration
19th Century South American Mayoruna man, illustration
19th Century South American Ticuna man, illustration
19th Century South American Juri man, illustration
Jean Baptiste De La Salle, French priest
Karl Etzel, German railway engineer
Francois Sudre, French composer
Jacques-Louis De Pourtales, Swiss banker
Moncure Robinson, US civil engineer
Gilbert Romme, French politician and mathematician
Sebastien Vauban, French military engineer
Charles Christofle, French jeweller
Francois Laurent, French aeronaut
Emile Pereire, French banker and businessman
Ernest Petin, French balloonist
Eugene Godard, French aeronaut
Joseph-Francois Malgaigne, French surgeon
Louis-Urbain-Aubert de Tourny, French architect
Tswana man, 19th Century illustration
Southeast Asian man, 19th Century illustration
19th Century Papuan people, illustration
19th Century Tahitian people
Guillaume Carcel, french inventor
San hunters, 19th Century illustration
Reduction of paraphimosis, 19th century
Compound microscope, 17th Century artwork
Marquis de Condorcet, French politician
Homer, Ancient Greek poet
Cleobulus of Lindos, Greek poet
Laozi, Ancient Chinese philosopher
Aspasia and Alcibiades, 19th century illustration
Georges Cuvier, French zoologist
Death of Laocoon, illustration
Pericles, Ancient Greek politician
Claude Berthollet, French chemist
Giuseppe Garibaldi, Italian revolutionary
Oracle of Delphi, 19th Century illustration