| "The Concourse of the Birds", Folio 11r from a Mantiq al-tair (Language of the Birds) MET DT227734.jpg | Habiballah Savaji | CC0 |
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| Il cannocchiale aristotelico, o sia, Idea dell'arguta et ingeniosa elocutione - che serue à tutta l'arte oratoria, lapidaria, et simbolica (1670) (14728046986).jpg | Tesauro, Emanuele, conte, 1592-1675; Piola, Domenico, 1627-1703; Tasnière, Giorgio, d. 17… | No restrictions |
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| Image-Al-Kitāb al-muḫtaṣar fī ḥisāb al-ğabr wa-l-muqābala.jpg | Muḥammad ibn Musa al-Khwarizmi | Public domain |
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| Kant - Prolégomène - iii.jpg | Emmanuel Kant | Public domain |
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| Kant-KdrV-1781.png | Unknown author | Public domain |
| Kantmetafisicadeicostumi.jpg | The original uploader was Giuseppe 90 at Italian Wikipedia . | Public domain |
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| Karl Korsch, Marxismus und Philosophie 1966.jpg | Unknown author Unknown author | Public domain |
| Karta tytułowa Króla Maciusia I Janusza Korczaka z 1923.jpg | Janusz Korczak | Public domain |
| Karta tytułowa Króla Maciusia na wyspie bezludnej Janusza Korczaka z 1923 roku.jpg | Janusz Korczak | Public domain |
| Kat sim budn title.JPG | Valerikpunk | Public domain |
| Kelmscott Press - The Nature of Gothic by John Ruskin (first page).jpg | Kelmscott Press , William Morris , John Ruskin | Public domain |
| Kepler - Ad Vitellionem paralipomena quibus astronomiae pars optica traditur, 1604 - 158093 F.jpg | Kepler, Johannes | Public domain |
| Kierkegaard Enten-Eller.jpg | Unknown author | Public domain |
| Kogaras-mar.jpg | AleksandrGertsen | CC BY-SA 3.0 |
| Korea-Domun.daejak-01.jpg | Heo Gyun]] | Public domain |
| Krafft-Ebing Psychopathia sexualis 1886.jpg | © Foto H.-P.Haack ( H.-P.Haack ) | Public domain |
| Krakatit-obal.jpg | Josef Čapek | Public domain |
| KreutzerSonata.jpg | Leo Tolstoy | Public domain |
| Kropotkine-grande-revolution.png | Peter Kropotkin. Scan by myself. | Public domain |
| KSM Duisburg Gerhard Mercator Erdglobus von 1541.jpg | Gerhard Mercator (1512-1594) | CC BY-SA 4.0 |
| Kubla Khan titlepage.jpg | Samuel Taylor Coleridge | Public domain |
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| L Annaei Senecae philosophi 1643 page 1 De Ira.png | Lucius Annaeus Seneca | Public domain |
| L Annaei Senecae philosophi 1643 page 375 De Brevitate Vitae.png | Lucius Annaeus Seneca | Public domain |
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| L'Ingenu.jpg | Voltaire | Public domain |
| La conquête du pain.jpg | Koroesu | Public domain |
| La favola delle api.jpg | Bernard de Mandeville | Public domain |
| La Guerre du feu (J.-H. Rosny aîné) - couverture illustrée par Carlègle.jpg | Charles Émile Egli | Public domain |
| La Peste book cover.jpg | Gallimard | Public domain |
| La Révolution trahie (1936) 13th edition.jpg | Grasset (publisher) | Public domain |
| La science et l'hypothèse - Henri Poincaré - Bibliothèque de Philosophie scientifique.jpg | Henri Poincaré, Ernest Flammarion éditeur | Public domain |
| La Subiro de la Okcidento, eldono 1922.jpg | Unknown author | Public domain |
| Lalka - strona tytulowa 1 wydania.jpg | Bolesław Prus | Public domain |
| Landbote.jpg | Georg Büchner | Public domain |
| Lasswitz - Auf zwei Planeten.jpg | Woodland987 | CC BY-SA 4.0 |
| Lastandfirstmen firstedition.jpg | Unknown author | Public domain |
| Le Livre des Esprits 2.jpg | Book: Allan Kardek Scan: Fran6fran6 | Public domain |
| Le Livre des Médiums.jpg | Fran6fran6 // Allan Kardec | Public domain |
| Le romant comique 1651.png | Paul Scarron | Public domain |
| Leibniz Monadology 1.jpg | Unknown author | Public domain |
| Leibniz, I - 041.jpg | Gottfried Wilhelm Leibniz | Public domain |
| Leo Tolstoi v kabinetie.05.1908.ws.jpg | Sergei Prokudin-Gorskii | Public domain |
| Leon Battista Alberti.jpg | Unknown author | CC BY-SA 3.0 |
| Leopardi Operette Morali Napoli 1835.jpg | Giacomo Leopardi (author of the book) Roman Eisele (photographer) | CC BY-SA 4.0 |
| Lessing Nathan der Weise 1779.jpg | © Foto H.-P.Haack . | Attribution |
| Letter Concerning Toleration.jpg | John Locke | Public domain |
| Lettres écrites de Londres sur les Anglois et autres sujets.png | Voltaire | Public domain |
| Lev Nikolayevich Tolstoy 1848.jpg | Pavel Biryukov | Public domain |
| Lev tolstoi carstvo bozhie vnutri vas.jpg | Leo Tolstoy | Public domain |
| Leviathan frontispiece cropped British Library.jpg | Abraham Bosse | CC0 |
| Libr0309.jpg | Image ID: libr0309, Treasures of the NOAA Library Collection Photographer: Archival Photo… | Public domain |
| Libro de tesoro.jpg | Cardeña2 | CC BY-SA 3.0 |
| Lilith a romance by George MacDonald.jpg | Boston Public Library | CC BY 2.0 |
| Littré - 1863 - A-C - page de titre.jpg | Jmh2o | CC BY-SA 4.0 |
| Llibre de les besties (1905) (portada).jpg | Ramon Llull amb pròleg de Mateu Obrador i Bennàssar | Public domain |
| Locke Essay 1690.jpg | The original uploader was Olaf Simons at German Wikipedia . | Public domain |
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| LockeConduct.png | Original uploader was Awadewit at en.wikipedia | Public domain |
| LockeEducation1693.jpg | John Locke (1632-1704) | Public domain |
| LucianTrueStoryIncipitAmsterdam1787.jpg | Eunostos for Wikimedia Commons | Public domain |
| Lully - Bellérophon - libretto, Paris 1679 - title page.png | Jean-Baptiste Lully / Thomas Corneille / Bernard Le Bovier de Fontenelle | Public domain |
| Luther 95 Thesen.png | Martin Luther | Public domain |
| Lutherbibel.jpg | Torsten Schleese | Public domain |
| Lyrical Ballads.jpg | William Wordsworth (1770-1850) and Samuel Taylor Coleridge (1772-1834). | Public domain |
| Lytras nikiforos antigone polynices.jpeg | Nikiforos Lytras | Public domain |
| Lüshi Chunqiu, Qing dynasty, Hunan Museum.jpg | Huangdan2060 | Public domain |
| L’esclavage des Noirs, ou l’Heureux Naufrage.png | Olympe de Gouges | Public domain |
| M.Maier. Symbola Aureae Mensae .1617.JPG | unbekannter Kupferstecher | Public domain |
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| Macrobius, Saturnalia, Florence, BML, Plut. 65.36.jpg | Macrobius | Public domain |
| Maeterlinck - Théâtre - L'Intruse 001.jpg | JoJan | Public domain |
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| MalebrancheSearchTruth.jpg | Nicolas Malebranche | Public domain |
| Manuscrito de Petrarca.jpg | Manu Matthaei domini Herculani de Vulterris; Francesco Petrarca | Public domain |
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| Marcus Aurelius. De seipso, seu vita sua (Xylander, 1558).jpg | Marcus Aurelius | Public domain |
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| Max Weber - Politik als Beruf Seite 01.jpg | Max Weber (1864-1920) | Public domain |
| Max Weber - Wissenschaft als Beruf - Seite 01.jpg | Max Weber (1864-1920) | Public domain |
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| Meister des Hildegardis-Codex 001 cropped.jpg | Meister des Hildegardis-Codex | Public domain |
| Memoirs of a Revolutionist (1899) title page.jpg | Book written by Peter Kropotkin, published by Houghton Mifflin | Public domain |
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| Michal Weinberg and Shiri Golan in Mary Stuart by Gadi Dagon.jpg | Gadi Dagon | CC BY-SA 3.0 |
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| Mikhail Nesterov 001.jpg | Mikhail Nesterov | Public domain |
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| Milton a Poem copy D 1818 Library of Congress object 1.jpg | William Blake | Public domain |
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| Monas Hieroglyphica.jpg | John Dee | Public domain |
| Montesquieu, De l'Esprit des loix (1st ed, 1748, vol 1, title page).jpg | Smuconlaw . | Public domain |
| Moritz von Schwind - Der Erlkönig - 615 - Österreichische Galerie Belvedere.jpg | Moritz von Schwind | Public domain |
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| Musashi ts pic.jpg | User Alkivar on en.wikipedia | Public domain |
| Musée Châlons-St Ambroise.jpg | Vassil | Public domain |
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| Nabeshima-Secretary-Hagakure-The-Analects-Bushido-Book.png | 大木陽堂 (1939) | Public domain |
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| Natural Magick by Giambattista della Porta.jpg | Printed for T. Young and S. Speed, London | Public domain |
| Negative Dialectics, German edition.jpg | Unknown author | Public domain |
| Netivot Hashalom.jpg | משה מנדלסון | Public domain |
| Newton's Principia title page.png | The original uploader was Zhaladshar at English Wikisource . | Public domain |
| Nicholas of Cusa, De docta ignorantia, Ms. 218.jpg | Nicholas of Cusa | Public domain |
| Nicholas Roerich, the Blind, 1906.jpg | Nicholas Roerich | Public domain |
| Nicolo Machiavelli, Il Principe, 1550, title page.jpg | Niccolò Machiavelli | Public domain |
| Notes from a Dead House.jpg | E. Pratz | Public domain |
| Nuremberg chronicles f 143v 3.jpg | Michel Wolgemut, Wilhelm Pleydenwurff (Text: Hartmann Schedel ) | Public domain |
| Nursery-alice-1890.png | E. Gertrude Thomson | Public domain |
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| On Liberty (first edition title page via facsimile).jpg | John Stuart Mill (author), John W. Parker and Son (publisher) | Public domain |
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| Os Sertões livro 1902.jpg | Euclides da Cunha (1866-1909) | Public domain |
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| Our national parks (1909) (14596193889).jpg | Muir, John, 1838-1914 author | No restrictions |
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| PaineRightsOfMan.png | Thomas Paine | Public domain |
| Papyrus of Plato Phaedrus.jpg | Anonymous ancient scribe | Public domain |
| Paradoxa.jpg | All information can be found at https://www.e-codices.unifr.ch/en/list/one/fmb/cb-0050 | CC BY 4.0 |
| Paralipomeni della Batracomiomachia.jpg | Original scan by Fæ + my own edits | Public domain |
| Parerga und Paralipomena (1902).jpg | Arthur Schopenhauer | Public domain |
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| Pastorale BCN Pere Posa 1495 F. 1r.jpg | Simater | CC BY-SA 4.0 |
| Paul Lafargue, Le Droit à la paresse (Maitrier).jpg | L Maitrier | CC BY-SA 4.0 |
| Peter Kropotkin, Ideale und Wirklichkeit in der russischen Literatur 1975.jpg | Unknown author Unknown author | Public domain |
| Petrarca - De viris illustribus, MCCCCLXXVI kl octobris - 2441749 Occhietto.jpeg | Petrarca, Francesco | Public domain |
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| Phantastes Title Page 1894.jpg | John Bell (illustration), George MacDonald (book) | Public domain |
| Phänomenologie des Geistes.jpg | The original uploader was Nihil Kainer at German Wikipedia . | Public domain |
| Pierre-Joseph Proudhon, System der ökonomischen Widersprüche 2003.jpg | Unknown author Unknown author | Public domain |
| Pilote de guerre, cover, 1942 (cropped).jpg | Harry Zilber | CC BY-SA 3.0 |
| Pisan lelivredestroisvertus.jpg | Illustrator of The Treasure of the City of Ladies, known as "City of Ladies Master" | Public domain |
| PL Jerzy Żuławski-Na srebrnym globie 039.jpeg | Antoni Procajłowicz (1876–1949) | Public domain |
| Plato Timaeus.jpg | Unknown author | Public domain |
| Plurality of Worlds.jpg | Unknown author | Public domain |
| Plutarch Han.jpg | Printer: Ulrich Han | Public domain |
| Polittico dei santi cosma e damiano (paolo veneziano) sant'ambrogio.jpg | Paolo Veneziano | Public domain |
| Poor Folk-1.png | Fyodor Dostoyevsky | Public domain |
| Portada Historia General de las drogas.jpg | Guillermo Herranz Luna | CC BY-SA 3.0 |
| Portada Libro de los Santos Ángeles.jpg | Simater | CC BY-SA 4.0 |
| POxy405.jpg | Irenaeus of Lyons | Public domain |
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| Princess and the Goblin.jpg | George MacDonald (1824 - 1905) | Public domain |
| Principia Ethica title page.png | G. E. Moore | Public domain |
| Principles of Psychology (James) v1 pi.jpg | William James | Public domain |
| Pro Archia.jpg | All information can be found at https://www.e-codices.unifr.ch/en/list/one/bge/lat0101/ | CC BY 4.0 |
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| Propos sur le bonheur.jpg | Alainauzas | CC BY-SA 4.0 |
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| Quadritpartitum.jpg | Claudius Ptolemy | Public domain |
| Quesnay - Tableau économiques.png | François Quesnay | Public domain |
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| Red Giant Earth.jpg | Celestia | GPL |
| Regiment de la Cosa Publica.jpg | Francesc Eiximenis | Public domain |
| Religion within the bounds of bare reason (German edition).jpg | Immanuel Kant | Public domain |
| Resalat Al-Ghufran book cover, Commerial library edition (1923).jpg | al-Ma'arri | Public domain |
| Resurrection 1899.jpg | Vladimir Chertkov | Public domain |
| Ricardo Essay on Profits 1815 Titlepage.png | David Ricardo | Public domain |
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| Risshou Ankokuron.jpg | Unknown author Unknown author | Public domain |
| Robert Recorde-The Whetstone of Witte 1557.gif | The original uploader was Rnm at Polish Wikipedia . | Public domain |
| Rokoshiiki.jpg | Kūkai | Public domain |
| Romola 1863.jpg | Eliot | Public domain |
| Rongo Analects 02.jpg | Confucius and his disciples, | Public domain |
| Rousseau in later life.jpg | Unknown author Unknown author | Public domain |
| RousseauJulie.jpg | Original uploader was Awadewit at en.wikipedia ; Jean-Jacques Rousseau (1712-1778) | Public domain |
| RUB 15 (Leipzig, 1949) - Schiller, Räuber.jpg | Cookroach | Public domain |
| RUB 41 (Leipzig, 1988, 9.Auflage) - Schiller, Wallenstein.jpg | Cookroach | Public domain |
| Russell title1912.jpg | Bertrand Russell | Public domain |
| Russell, Whitehead - Principia Mathematica to 56.jpg | Nick Dillinger | Public domain |
| Sade - Les 120 Journées de Sodome, éd. Dühren, 1904 (page 6 crop).jpg | Marquis de Sade | Public domain |
| Sade 1.jpeg | Ωριγένης | Public domain |
| Schiller Theaterzettel Jungfrau von Orléans 1801.jpg | Unknown author Unknown author | Public domain |
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| ScuderyArtamene.jpg | Madeleine de Scudéry | Public domain |
| Secretum.jpg | Unknown author Unknown author | Public domain |
| SekienOmagatoki.jpg | Toriyama Sekien ( 鳥山石燕 , Japanese, *1712, †1788) | Public domain |
| SekienShinkiro.jpg | Toriyama Sekien ( 鳥山石燕 , Japanese, *1712, †1788) | Public domain |
| SekienTakarabune1.jpg | Toriyama Sekien ( 鳥山石燕 ) | Public domain |
| Ser Ricciardo di Nanni 001.jpg | 3 putti supporting a coat-of-arms in a gold cartouche, by Ser Ricciardo di Nanni | Public domain |
| Servet Ptolomei geographicae enarrationis.jpg | Miguel Servet | Public domain |
| Shiji.jpg | Unknown author | Public domain |
| Silas Marner 1.jpg | Published by Blackwood, 1861 | Public domain |
| Silver Dove.jpg | П. С. Уткин | Public domain |
| Social contract rousseau page.jpg | Unknown author | Public domain |
| Socialisme utopique et socialisme scientifique (Engels 1880) cover.png | Friedrich Engels | Public domain |
| Solaris, various editions 02.jpg | HTO | CC0 |
| Songs of Innocence and of Experience, copy Z, 1826 (Library of Congress) object 01 Frontispiece to Songs of Innocence.jpg | William Blake | Public domain |
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| Stanislavski The Fruits of Enlightenment (1891).jpg | Unknown author Unknown author | Public domain |
| Statism and Anarchy.jpg | Koroesu | Public domain |
| Stephanus Platonis opera quae extant omnia title.jpg | Platon; Henricus Stephanus | Public domain |
| Story of the Eye (French edition).jpg | Georges Bataille | Public domain |
| Strabon Rerum geographicarum 1620.jpg | Unknown author | Public domain |
| Sullivan carlyle.jpg | Edmund Joseph Sullivan | Public domain |
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| Syntactic Structures Front Cover (1957 first edition).jpg | Unknown author Unknown author | Public domain |
| Table-Talk (Hazlitt) volume 1 first edition title page.jpg | William Hazlitt | Public domain |
| Tale-Title.gif | Jonathan Swift | Public domain |
| Taqwim-al-sihha cropped s.jpg | Unknown | Public domain |
| Tatiani Oratio ad Graecos - Hermiae Irrisio Gentilium Philosophorum - MDCC.jpg | E. Theatro Sheldoniano, 1700. | Public domain |
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| Terc Crestia.jpg | Unknown author Unknown author , miniaturist / copyist unknown, original author: Francesc… | Public domain |
| Terre des hommes, de Antoine de Saint Exupéry, aux éditions Gallimard, 1939.JPG | Antoin de Saint-Exupéry (29 June 1900 – 31 July 1944) | Public domain |
| The Accumulation of Capital.jpg | Verlag: Buchhandlung Vorwärts Paul Singer G.m.b.h | Public domain |
| The Coal Question 2nd Edition Cover.jpg | William Stanley Jevons | Public domain |
| The Economic consequences of peace.jpg | John Maynard Keynes | Public domain |
| The Federalist (1st ed, 1788, vol I, title page) - 02.jpg | Publius (pseudonym) [ Alexander Hamilton , John Jay , James Madison ]. | Public domain |
| The first edition of Dostoevsky's novel Demons Petersburg 1873.JPG | Типография К. Замысловского (1873) | Public domain |
| The Gambler (novel) 1866 first edition cover.jpg | Fyodor Dostoyevsky | Public domain |
| The History of Hayy Ibn Yaqzan (page 13 crop).jpg | Creator:Ibn Tufayl | Public domain |
| The method of fluxions and infinite series cover.jpg | Isaac Newton | Public domain |
| The Mill on the Floss.jpg | George Eliot/Published by William Blackwood, 1860 | Public domain |
| The Napoleon of Notting Hill - cover - Project Gutenberg eText 20058.jpg | Unknown author | Public domain |
| The Open Society and Its Enemies, first edition, volume one.jpg | Routledge | Public domain |
| The Perfect Way in Diet (1881).png | Anna Kingsford | Public domain |
| The Prophet (Gibran).jpg | Kahlil Gibran | Public domain |
| The rape of the lock pg 1.jpg | The_rape_of_the_lock.djvu : Alexander Pope derivative work: Theornamentalist ( talk ) | Public domain |
| The rime of the ancient Mariner - Coleridge.jpg | Unknown author | Public domain |
| The Sceptical Chymist.jpg | Robert Boyle | Public domain |
| The Secret Doctrine.gif | Helena Blavatsky | Public domain |