Theory Collection (page 3)

Friedrich Engels (1820-1895), German social scientist, writer, political theorist, philosopher, and (with Karl Marx) father of communist theory. Date: late 19th century

Euclid or Archimedes: detail from the School of Athens in the Stanza della Segnatura, 1510-11 (fresco)
3362162 Euclid or Archimedes: detail from the School of Athens in the Stanza della Segnatura, 1510-11 (fresco) by Raphael (Raffaello Sanzio of Urbino) (1483-1520); Vatican Museums and Galleries

Satire on Charles Darwin's theory of evolution. From El Museo Popular published Madrid, 1887
693683 Satire on Charles Darwin's theory of evolution. From El Museo Popular published Madrid, 1887 by Spanish School, (19th century)

Water (Phlegmaticus), from The Four Temperaments, 1596-97 Creator: Zacharias Dolendo
Water (Phlegmaticus), from The Four Temperaments, 1596-97

Ostrich, River, Cobbler, Religion, Carpenter and Grinder: The Month of January
ALG174482 Ostrich, River, Cobbler, Religion, Carpenter and Grinder: The Month of January, from a zodiac cycle inspired by the astrological theories of Pietro d Albano (1257-1315) (fresco)

Frontispiece from "A Plaine and Easie Introduction to Practicall Musicke"
LRI3611983 Frontispiece from " A Plaine and Easie Introduction to Practicall Musicke" by Thomas Morley, Detail, 1597 (engraving) by English School

Frontispiece from "A Plaine and Easie Introduction to Practicall Musicke"
LRI3611982 Frontispiece from " A Plaine and Easie Introduction to Practicall Musicke" by Thomas Morley, Detail, 1597 (engraving) by English School

Cartoon titled A Logical Refutation of Mr Darwins Theory
5308836 Cartoon titled A Logical Refutation of Mr Darwins Theory - a father tries to explain Darwins Theory to his Wife and daughter by Du Maurier

Frontispiece to Almagestum Novum by Giovanni Battista Riccioli
618939 Frontispiece to Almagestum Novum by Giovanni Battista Riccioli, published in 1651 (engraving) by Italian School, (17th century); Private Collection; (add.info)

Diagram of consciousness, from Robert Fludds Utriusque Cosmi Historia
XJF447343 Diagram of consciousness, from Robert Fludds Utriusque Cosmi Historia, edition published in 1629 (engraving) by English School

Anacreon (colour litho)
2802036 Anacreon (colour litho) by French School, (19th century); Private Collection; (add.info.: Anacreon. Illustration for Le Livre D Amour (Boulanger, c 1890).); © Look and Learn

The night patrol of the London streets, 1853
The night patrol of the London streets. The figure of Death on horseback rides out of an overcrowded cemetery full of cholera victims

Friedrich Engels, German philosopher and political theorist, 1889 (b / w photo)
3101016 Friedrich Engels, German philosopher and political theorist, 1889 (b/w photo) by German Photographer, (19th century); Private Collection; (add.info.: Friedrich Engels (1820-1895)

Titlepage to Progress and Poverty by Henry George
XJF365385 Titlepage to Progress and Poverty by Henry George, published in 1880 (print) (b/w photo) by American School, (19th century); Private Collection; (add.info.: full title: Progress and Poverty)

Various methods of observing sunspots, illustration from Rosa Orsina
XJF294057 Various methods of observing sunspots, illustration from Rosa Orsina by Christoph Scheiner, published 1630 (engraving) (b/w photo) (for detail see 294058) by German School

Shining star over square and Compass and lead, 1826 (litho)
XPH311118 Shining star over square and Compass and lead, 1826 (litho) by Goethe, Johann Wolfgang von (1749-1832); Private Collection; (add.info.: Leuchtender Stern ueber Winkelwaage)

Circle demonstrating colour differences and contrasts, from a book
CHT316934 Circle demonstrating colour differences and contrasts, from a book, Expose d un Moyen de definir et de nommer les couleurs, by Eugene Chevreul

View of an Ideal City, or The City of God, c. 1480-1490 (oil on panel)
AII80438 View of an Ideal City, or The City of God, c. 1480-1490 (oil on panel) by Laurana, Luciano (c.1420-79) (attr. to); Galleria Nazionale delle Marche, Urbino, Marche

Evolution of Man from Mammals, from La Creation Naturelle et les Etres Vivants
CHT164093 Evolution of Man from Mammals, from La Creation Naturelle et les Etres Vivants by Doctor Jules Rengade (b.1841), 1883 (colour engraving) by Demarle, A

Capital depicting the Second Key of Plainsong, c. 1095 (stone)
XIR166595 Capital depicting the Second Key of Plainsong, c.1095 (stone) by French School, (11th century); Musee du Farinier, Ancienne Abbaye, Cluny

Demonstration of the Third Equilibrium, c. 1800 (pen & ink on paper)
ACD169652 Demonstration of the Third Equilibrium, c.1800 (pen & ink on paper) by Ampere, Andre Marie (1775-1836); Academie des Sciences, Paris

Notations Chromatiques, after 1900 (w / c, gouache & pencil on paper) (recto of 694043)
694044 Notations Chromatiques, after 1900 (w/c, gouache & pencil on paper) (recto of 694043) by Filiger, Charles (1863-1928); 24.4x29.8 cm; Private Collection; Photo eChristies Images; French

Notations Chromatiques, after 1900 (w / c, gouache & pencil on paper) (recto of 694044)
694043 Notations Chromatiques, after 1900 (w/c, gouache & pencil on paper) (recto of 694044) by Filiger, Charles (1863-1928); 24.4x29.8 cm; Private Collection; Photo eChristies Images; French

Frontispiece of Principals of Political Right by Jean Jacques Rousseau
CH440580 Frontispiece of Principals of Political Right by Jean Jacques Rousseau, with allegorical vignette of Liberty, engraved by Borly, published 1762 (print & engraving) by Bolomey

Rene Descartes, copy by Boris Mestchersky (d. 1957) illustration from
STC397181 Rene Descartes, copy by Boris Mestchersky (d.1957) illustration from Histoire de la Nation Francaise, Sciences, Volumes I & II, by Gabriel Hanotaux (1853-1944)

Allegory of human hearing and music, from Utriusque Cosmi Historia Tractatus
CHT360253 Allegory of human hearing and music, from Utriusque Cosmi Historia Tractatus Secundus de naturae Simia seu Tecnica Macrocosmi, published in Frankfurt, 1617-24 (engraving) by German School

Benjamin Franklin (engraving)
815920 Benjamin Franklin (engraving) by Martin, David (1736/7-98) (after); Private Collection; (add.info.: Benjamin Franklin (1706-1790)

View of an Ideal City, or The City of God, c. 1480-1490 (oil on panel)
AII80437 View of an Ideal City, or The City of God, c. 1480-1490 (oil on panel) by Laurana, Luciano (c.1420-79) (attr. to); Galleria Nazionale delle Marche, Urbino, Marche

View of an Ideal City, or The City of God, after 1470 (detail of 80057) (oil on panel)
AII80436 View of an Ideal City, or The City of God, after 1470 (detail of 80057) (oil on panel) by Laurana, Luciano (c.1420-79) (attr)

Depopulation and Repopulation in France, booklet by Arthur Le Creps against
CHT220321 Depopulation and Repopulation in France, booklet by Arthur Le Creps against Malthusianism, 1895 (colour engraving) by French School, (19th century); Bibliotheque des Arts Decoratifs, Paris

Rene Descartes (1596-1650) writing his world system, engraved by Jean Baptiste Moret (fl
CHT322572 Rene Descartes (1596-1650) writing his world system, engraved by Jean Baptiste Moret (fl.1790-1820), 1791 (colour litho) by Desfontaines

Christ surrounded by the Four Elements (vellum)
CHT327014 Christ surrounded by the Four Elements (vellum) by French School, (15th century); Bibliotheque Nationale, Paris

Pythagoras (c. 580-500 BC) and Music, title page from Lilium Musicae
XIR217861 Pythagoras (c.580-500 BC) and Music, title page from Lilium Musicae by Michael Keinspeck, Augsburg, published in 1500 (engraving) (b/w photo) by German School

The Beginning of Generation, from Robert Fludds Mosaicall philosophy
XJF447351 The Beginning of Generation, from Robert Fludds Mosaicall philosophy, 1659 (engraving) by English School, (17th century); Private Collection; (add.info)

Application of the Cercle Chromatique of Charles Henry, 1889 (colour litho)
CHT316933 Application of the Cercle Chromatique of Charles Henry, 1889 (colour litho) by Signac, Paul (1863-1935); Bibliotheque des Arts Decoratifs, Paris

Diagram showing the decomposition of light - Structure of Solar rays
746737 Diagram showing the decomposition of light - Structure of Solar rays. 1855 (colour litho) by American School, (19th century); Private Collection; (add.info)

Capital depicting the First Key of Plainsong with a dulcimer player, c. 1095 (stone)
XIR166596 Capital depicting the First Key of Plainsong with a dulcimer player, c.1095 (stone) by French School, (11th century); Musee du Farinier, Ancienne Abbaye, Cluny

Heraclitus and Democritus (oil on canvas)
3496704 Heraclitus and Democritus (oil on canvas) by Figino, Ambrogio Giovanni (1548-1608); 52x73 cm; Private Collection; (add.info.: Giovanni Ambrogio Figino-Eraclito e Democrito 52x73cm)

Advertisement for Professor Hermann von Helmholtzs Lectures on Acoustics
3601182 Advertisement for Professor Hermann von Helmholtzs Lectures on Acoustics, 1861 (print) by English School, (19th century); The Royal Institution, London, UK; eRoyal Institution; English

Properties of Water, from the De proprietatibus rerum
LRI1152377 Properties of Water, from the De proprietatibus rerum by Bartholomeus Anglicus (vellum) by French School, (15th century); BibliothAque Carnegie de Reims

Title Page of Memoria Technica, Oxford, 1888 (pencil on paper)
480625 Title Page of Memoria Technica, Oxford, 1888 (pencil on paper) by Dodgson, Charles Lutwidge (Lewis Carroll) (1832-98); 19.5x12.2 cm; Private Collection; Photo eChristies Images; British

Charles Le Brun (chromolitho)
667022 Charles Le Brun (chromolitho) by French School, (19th century); Private Collection; (add.info.: Charles Le Brun. French educational card, late 19th century.); © Look and Learn

Ancestry according to Darwin (engraving)
736160 Ancestry according to Darwin (engraving) by English School, (19th century); Private Collection; (add.info.: Monkey-Ana; or Ancestry according to Darwin; The Development by Selection theory)

Ms 2200 f. 115v. The World, according to Aristotle, miniature from
CHT307486 Ms 2200 f.115v. The World, according to Aristotle, miniature from De Philosophia Mundi by Guillaume de Conches (1100-54) 1276-77 (vellum) by French School

Rene Descartes, from Portraits des Grands Hommes, femmes illustres
STC312841 Rene Descartes, from Portraits des Grands Hommes, femmes illustres, et sujets memorables de France, grave et imprimes en couleurs, published by Pierre Blin, 1786-92

Frontispiece to William Harveys De Generatione Animalium
XJF294005 Frontispiece to William Harveys De Generatione Animalium published in 1651 (engraving) (b/w photo) by English School

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"Theory: Unveiling the Hidden Patterns of the Universe" From ancient times to modern scientific breakthroughs, theories have shaped our understanding of the world. A histological diagram of a mammalian retina reveals intricate structures that support the theory of vision. Mendeleyev's periodic table, created in 1869, laid the foundation for understanding elements and their properties. Richard Feynman, a brilliant physicist depicted in a caricature, contributed to quantum mechanics and explained complex concepts with his unique approach. The standard periodic table showcases various element types discovered over centuries. The bust of Claudius Galen reminds us of his influential medical theories during ancient Rome. An artwork depicting the universe timeline takes us on an awe-inspiring journey through cosmic evolution. A geological unconformity on the river Jed hints at Earth's dynamic nature and supports theories about plate tectonics. Starlight bent by the Sun's attraction highlights Einstein's theory of general relativity, revolutionizing our perception of gravity. Dalton's table of atomic symbols from 1835 provides insights into early attempts to understand matter at its fundamental level. Continental drift maps demonstrate how continents have shifted over millions of years due to plate tectonics. The concept of multiple universes challenges conventional thinking and expands our imagination beyond what we can observe directly. Theories continue to push boundaries and inspire new discoveries as humanity strives to unravel the mysteries surrounding us. In this captivating collage, we witness how theories connect seemingly disparate fields - from biology and chemistry to physics and geology - offering glimpses into profound truths that shape our existence in this vast universe.