Seneca the Elder, Roman orator
Persius, Roman poet
Agrippa, Roman general
Sallust, Roman historian
Virgil, Roman poet
Constantine I, Roman emperor
Jules Verne, French novelist
Roman library, Late Roman Empire
Homer, Ancient Greek poet
Cicero, Roman philosopher
Aristotle, Ancient Greek philosopher
Joseph Jackson, English typefounder
Pedanius Dioscorides, Greek physician
Lysias, Ancient Greek orator
Thomas Carlyle, Scottish writer
Colosseum in Rome, artwork
Albrecht Wilhelm Roth, German botanist
Roman baths, artwork
Victor Hugo, French Author, illustration
Charles Townley, British antiquarian
James Boswell, Scottish author
Alfred Brehm, German zoologist
Jean-Jacques Rousseau, French philosopher
Richard Dawkins, British science writer
Papyrus scrolls, Ancient Rome
Roman temple, artwork
Roman domus, artwork
Henri Becquerel, French physicist
George Boole, British mathematician
Arthur Schopenhauer, German philosopher
Celsus, Roman encyclopaedist
B. F. Skinner, caricature
Matt Ridley, caricature
Heinrich Schliemann, German archaeologist
Archilochus of Paros, Ancient Greek poet
Sappho, Ancient Greek poet
Thomas Craig, Scottish legal scholar
Roman stables from Pompeii
Roman arch construction, artwork
Max Planck, caricature
Roman water pump design, artwork
Charles Darwin, caricature
John Scott Haldane, caricature
Jeremy Bentham, British philosopher
Henry Cavendish, British chemist
Charles Coulomb, French physicist
Heinrich Hertz, German physicist
James Joule, British physicist
Joseph Lister, British surgeon
Hans Christian Oersted, Danish physicist
Georg Ohm, German physicist
Alessandro Volta, Italian physicist
Henrik Ibsen, Norwegian playwright
Centaurs, 19th Century illustration
Ernst von Bergmann, German surgeon
Boar hunting in Ancient Greece
Samuel Pepys, English diarist
William Gifford, British poet and editor
Edward Kelley, English astrologer
John Hunter, Scottish surgeon
Prokop Divis, Czech scientist
Carl Merck, German naturalist
Adolf Bastian, German ethnologist
Heinrich Barth, German explorer
Christian Ehrenberg, German naturalist
Carl Ritter, German geographer
Heinrich Dove, Prussian physicist
Louis Stromeyer, German surgeon, artwork
Hermann von Wissmann, German explorer
Friedrich Jahn, German gymnastics teacher
Bernhard von Gudden, German anatomist
Ernst von Dechen, German geologist
Friedrich von Frerichs, German optician
Ferdinand von Hebra, Austrian physician
Hermann Kolbe, German chemist
Wilhelm Foerster, German astronomer
Crawford Long, US surgeon
Ernest Rutherford, caricature
Andre-Marie Ampere, French physicist
Albert Einstein, Swiss-German physicist
Hermann von Helmholtz, German physicist
Theodosius I, Roman Emperor
Ancient Greek warrior
Marguerite Gardiner, Irish writer
Alfred Tennyson, poet, illustration
Patrick Moore, British astronomer
Roman bridge building, illustration
John Logie Baird, caricature
Brian Cox, caricature
George Berkeley, Irish philosopher
James Hutton, British geologist
Robert Oppenheimer, US physicist
Robert Watson-Watt, British physicist
Alfred Wegener, German geophysicist
Andrew Wiles, British mathematician
Horace's Villa, 19th century
Moliere, French playwright
Temple of Peace, Rome, 19th Century illustration
Roman kiln, artwork
Steven Pinker, Canadian psychologist
Pliny the Elder, Roman naturalist, illustration
Socrates, Ancient Greek philosopher
Roman augurs and oracle, illustration
Gottfried Leibniz, caricature
Robert Brown, Scottish botanist
Ptolemy, Greek astronomer
Martin Lichtenstein, German physician
Asclepius and Hygieia, ancient Greek god and goddess
Armand-Pierre Seguier, French lawyer
Dmitri Mendeleev, caricature
James Clerk Maxwell, caricature
Cleobulus of Lindos, Greek poet
Johann Kaspar Lavater, Swiss theologist
Death of Laocoon, illustration
Thomas Sonnet de Courval, French poet
John Evelyn, English author
Sneyd Davies, English poet
Pythagoras, Ancient Greek mathematician
John Fothergill, English physician
Richard Pulteney, British botanist
William Cuming, Scottish physician
Ancient Greek athletes running, illustration
Mycenaean warrior, illustration
19th Century velocipede, artwork
19th Century ladies handcar, artwork
Daniel Dennett, US cognitive scientist
John Maynard Smith, caricature
Francis Bacon, English philosopher
John Bardeen, US physicist
Galileo Galilei, Italian astronomer
A. van Leeuwenhoek, Dutch microbiologist
Linus Pauling, US chemist
Karl Popper, Austrian-British philosopher
Voltaire, French author
William Shakespeare, English playwright
Plato, Ancient Greek philosopher
Francesco di Giorgio Martini, Italian architect and painter
Peach Prunus persica, artwork
Nerium oleander, 19th century
Gymea lily, 19th century
Strobilantes flowers
Lily and orchid flowers
Clove plant flowers and fruit
Cinnamon flowers and leaves
Osbeckia chinensis flowers
Neem flowers and fruits
Coffee plant and beans
Cucumber tree fruits
Malay apple flowers and fruit
Purple gentian flowers
Nutmeg fruits and seeds
Malabar arrowroot flowers and rhizome
Black pepper growing on the vine
Silk cotton flowers and boll
Calogyne corrugata flowers
Green tea flowers and fruits
East Indian Klugia flowers
Tobacco flowers
Indian rosebay flowers
Cashew plant fruit and nuts
Water lily (Nymphaea ampla), artwork
Edmondia sesamoides, artwork
Capillipedium parviflorum, artwork
Alga (Ulva lingulata), artwork
Alga (Ulva pavonia), artwork
Kelp (Fucus agarum), artwork
Kelp (Fucus radiatus), artwork
Kelp (Fucus bulbosus), artwork
Kelp (Fucus digitatus), artwork
Kelp (Fucus crispus), artwork
Kelp (Fucus saccatus), artwork
Arthur C. Clarke, British futurist
Isaac Asimov, US author and biochemist
Stephen Gould, US palaeontologist
David Hilbert, caricature
Ernst Kummer, caricature
Henri Poincare, caricature
Lord Kelvin, caricature
Tacitus, Roman senator and historian
Gods on Mount Olympus, 19th Century illustration
Hercules and the Cercopes, 5th century BC sculpture
Pharaoh Amenhotep I, 1888 artwork
Croesus on the stake, historical artwork
Andrew Ducarel, British antiquarian
Ancient Egyptian scribe working, illustration
Emil Rossmassler, German biologist
John Nichols, British antiquarian