Artists

1. Claude Monet
2. Diego Velázquez
3. El Greco
4. Hokusai
5. Leonardo da Vinci
6. Michelangelo
7. Pablo Picasso
8. Rembrandt
9. Salvador Dalí
10. Vincent van Gogh

Writers

1. Homer
2. Sophocles
3. Virgil
4. Li Bai
5. Rumi
6. Dante Alighieri
7. William Shakespeare
8. Miguel de Cervantes
9. Molière
10. Johann Wolfgang von Goethe
11. Edgar Allan Poe
12. Fyodor Dostoyevsky
13. Leo Tolstoy
14. James Joyce
15. Franz Kafka

Composers and musicians

1. Johann Sebastian Bach
2. Wolfgang Amadeus Mozart
3. Ludwig van Beethoven
4. Frédéric Chopin
5. Giuseppe Verdi
6. Richard Wagner
7. Igor Stravinsky
8. Elvis Presley
9. The Beatles
10. Jimi Hendrix

Filmmakers

1. Walt Disney

Explorers

1. Roald Amundsen
2. Jacques Cartier
3. Christopher Columbus
4. James Cook
5. Ferdinand Magellan
6. Marco Polo
7. Ibn Battuta
8. Zheng He
9. Vasco da Gama

Inventors and scientists

1. Nicolaus Copernicus
2. Charles Darwin
3. Thomas Edison
4. Albert Einstein
5. Michael Faraday
6. Galileo Galilei
7. Jābir ibn Hayyān
8. Antoine Lavoisier
9. Carl Linnaeus
10. Antonie van Leeuwenhoek
11. Isaac Newton
12. Benjamin Franklin
13. John Dalton
14. Nikola Tesla
15. Niels Bohr
16. Marie Curie
17. Dmitri Mendeleev
18. Shen Kuo

Mathematicians

1. Archimedes
2. Euclid
3. Leonhard Euler
4. Joseph Fourier
5. Carl Friedrich Gauss
6. David Hilbert
7. Pierre-Simon Laplace
8. Gottfried Leibniz
9. John von Neumann
10. Pythagoras
11. Alan Turing
12. Muḥammad ibn Mūsā al-Khwārizmī

Philosophers and social scientists

1. Confucius
2. Socrates
3. Plato
4. Aristotle
5. Adi Shankara
6. Nagarjuna
7. Avicenna
8. Thomas Aquinas
9. Ibn Khaldun
10. René Descartes
11. John Locke
12. Immanuel Kant
13. Karl Marx
14. Friedrich Nietzsche
15. Sigmund Freud
16. Max Weber

Religious figures

1. Abraham
2. Moses
3. Gautama Buddha
4. Guru Nanak Dev
5. Zoroaster
6. Laozi
7. Jesus
8. Mary (mother of Jesus)
9. Muhammad
10. Ali
11. Martin Luther
12. Paul the Apostle

Politicians and leaders

1. Hammurabi
2. Ramesses II
3. Cyrus the Great
4. Pericles
5. Alexander the Great
6. Qin Shi Huang
7. Julius Caesar
8. Augustus
9. Constantine the Great
10. Attila
11. Charlemagne
12. Genghis Khan
13. Joan of Arc
14. Suleiman the Magnificent
15. Elizabeth I of England
16. Napoleon
17. Abraham Lincoln
18. Mohandas Karamchand Gandhi
19. Joseph Stalin
20. Adolf Hitler
21. Mao Zedong
22. Nelson Mandela

1. History
2. Civilization
3. History of the world
4. History of Africa
5. History of the Americas
6. History of China
7. History of Europe
8. History of India
9. History of Japan
10. History of the Middle East
11. History of the United States

Prehistory to Middle Ages

1. Prehistory
2. Ancient history
3. Stone Age
   1. Mesopotamia
   2. Neolithic Revolution
   3. Sumer
4. Bronze Age
   1. Ancient Egypt
   2. Assyria
   3. Indus Valley Civilization
5. Iron Age
   1. Ancient Greece
   2. Ancient Rome
   3. Achaemenid Empire
6. Middle Ages
   1. Black Death
   2. Byzantine Empire
   3. Crusades
   4. East–West Schism
   5. Holy Roman Empire
   6. Islamic Golden Age
   7. Mongol Empire
   8. Ottoman Empire
   9. Viking Age

Renaissance to present

1. Renaissance
2. Protestant Reformation
3. Age of Discovery
4. European colonization of the Americas
5. Scientific revolution
6. Age of Enlightenment
7. Industrial Revolution
8. French Revolution
9. Napoleonic Wars
10. Abolitionism
11. Scramble for Africa
12. British Empire
13. Russian Empire
14. Soviet Union
15. Women's suffrage
16. World War I
17. Great Depression
18. World War II
19. The Holocaust
20. Cold War
21. Arab–Israeli conflict
22. Islamism
23. Korean War
24. Civil rights movement
25. Cultural Revolution
26. Space exploration
27. Revolutions of 1989

1. Geography

Bodies of water

1. Ocean
   1. Arctic Ocean
   2. Atlantic Ocean
   3. Indian Ocean
   4. Pacific Ocean
   5. Southern Ocean
2. Sea
   1. Caribbean Sea
   2. Mediterranean Sea
3. Lake
   1. Caspian Sea
   2. Great Lakes
   3. Lake Baikal
   4. Lake Victoria
4. River
   1. Amazon River
   2. Mississippi River
   3. Nile
   4. Yangtze River

Cities

1. City
   1. Beijing
   2. Cairo
   3. Delhi
   4. Istanbul
   5. Jakarta
   6. Jerusalem
   7. London
   8. Mexico City
   9. Moscow
   10. Mumbai
   11. New York City
   12. Paris
   13. Rome
   14. São Paulo
   15. Singapore
   16. Tokyo

Continents and regions

1. Continent
   1. Africa
   2. Antarctica
   3. Asia
   4. Europe
   5. North America
   6. South America
   7. Australia
2. Latin America
3. Oceania
4. Middle East
5. Arctic

Countries

1. Country
   1. Australia
   2. Bangladesh
   3. Brazil
   4. Canada
   5. China
   6. Egypt
   7. France
   8. Germany
   9. India
   10. Indonesia
   11. Iran
   12. Italy
   13. Japan
   14. Mexico
   15. Nigeria
   16. Pakistan
   17. Philippines
   18. Russia
   19. South Africa
   20. Spain
   21. Turkey
   22. United Kingdom
   23. United States

Geographic features

1. Desert
   1. Sahara
2. Forest
3. Glacier
4. Grand Canyon
5. Great Barrier Reef
6. Mountain
   1. Alps
   2. Andes
   3. Himalayas
      1. Mount Everest
   4. Rocky Mountains

1. Art
2. History of art
3. Aesthetics
4. Library
5. Museum

Artistic movements

1. Gothic art
2. Baroque
3. Romanticism
4. Modernism
5. Postmodernism
6. Popular culture

Literature

1. Literature
2. History of literature
3. Book
4. Fiction
5. Poetry
6. Prose
   1. Novel
   2. Short story
7. Works
   1. Don Quixote
   2. Epic of Gilgamesh
   3. Iliad
   4. Mahabharata
   5. Shahnameh

Music

1. Music
2. History of classical music traditions
3. Musical instrument
4. Singing
5. Genres
   1. Classical music
   2. Folk music
   3. Hip hop music
   4. Jazz
   5. Pop music
   6. Rock music

Performing arts

1. Performing arts
2. Dance
3. Film
4. Opera
   1. Orchestra
5. Theatre
   1. Comedy
   2. Tragedy
   3. Drama
   4. Musical theatre

Visual arts

1. Visual arts
2. Architecture
   1. Angkor Wat
   2. Colosseum
   3. Fallingwater
   4. Great Pyramid of Giza
   5. Great Wall of China
   6. Machu Picchu
   7. Parthenon
   8. Stonehenge
   9. Taj Mahal
3. Comics
4. Drawing
5. Painting
   1. History of painting
   2. Mona Lisa
6. Fine art
7. Photography
8. Pottery
9. Sculpture

Philosophy

1. Philosophy
2. Philosophical branches
   1. Ethics
      1. Golden Rule
      2. Good and evil
   2. Epistemology
      1. Belief
      2. Knowledge
      3. Reason
      4. Truth
   3. Logic
   4. Metaphysics
      1. Existence
      2. Ontology
      3. Free will
3. Philosophy by region and period
   1. Western philosophy
      1. Ancient Greek philosophy
      2. Medieval philosophy
      3. Islamic philosophy
      4. Contemporary philosophy
   2. Eastern philosophy
      1. Chinese philosophy
         1. Confucianism
      2. Indian philosophy
4. Philosophical movements
   1. Pragmatism
   2. Analytic philosophy

Religion

1. Religion
2. Afterlife
3. Deity
   1. God
   2. Goddess
4. Mythology
5. Mysticism
6. Soul
7. Spirituality
8. Meditation
9. Prayer
10. Worship
11. Theistic philosophies
    1. Theism
    2. Agnosticism
    3. Atheism
    4. Deism
    5. Gnosticism
    6. Pantheism
    7. Polytheism
    8. Shamanism

Specific religions

1. Bahá'í Faith
2. Buddhism
   1. Mahayana
   2. Theravada
   3. Vajrayana
3. Christianity
   1. Bible
   2. Catholic Church
   3. Eastern Orthodox Church
   4. Protestantism
4. Hinduism
   1. Vedas
   2. Upanishads
   3. Bhagavad Gita
   4. Shaktism
   5. Krishna
   6. Kali
5. Islam
   1. Five Pillars of Islam
   2. Islamic schools and branches
   3. Quran
6. Jainism
7. Judaism
   1. Tanakh
   2. Talmud
8. Shinto
9. Sikhism
   1. Guru Granth Sahib
10. Taoism

1. Clothing
2. Cooking
3. Color
4. Emotion
   1. Anger
   2. Fear
   3. Love
   4. Happiness
5. Family
   1. Adult
   2. Child
   3. Infant
   4. Marriage
6. Furniture
7. Gender
   1. Man
   2. Woman
8. Mind
   1. Consciousness
   2. Thought
9. Personal life
10. Sexuality
11. Sleep
    1. Dream

Food and drink

1. Food
   1. Bread
   2. Cereal
   3. Cheese
   4. Egg
   5. Fruit
   6. Maize
   7. Meat
   8. Nut
   9. Potato
   10. Rice
   11. Soybean
   12. Spice
   13. Vegetable
   14. Wheat
2. Drink
   1. Beer
   2. Coffee
   3. Drinking water
   4. Milk
   5. Tea
   6. Wine

Language

1. Language
2. Personal name
3. Alphabet
   1. Letter
   2. Arabic alphabet
   3. Brahmic scripts
   4. Chinese characters
   5. Cyrillic alphabet
   6. Latin alphabet
   7. Greek alphabet
4. Grammar
5. Word
6. Writing
7. Specific languages
   1. Arabic language
   2. Bengali language
   3. Chinese language
   4. English language
   5. French language
   6. German language
   7. Greek language
   8. Hindustani language
   9. Japanese language
   10. Latin
   11. Portuguese language
   12. Russian language
   13. Spanish language
   14. Tamil language
8. Indo-European languages

Recreation and entertainment

1. Recreation
2. Game
   1. Board game
   2. Card game
   3. Chess
   4. Go
   5. Video game
3. Gambling
4. Physical exercise
5. Sport
   1. Association football
   2. Cricket
   3. Olympics
   4. Track and field
6. Toy

1. Society
2. Community
3. Culture

Social issues

1. Abortion
2. Civil liberties
3. Discrimination
   1. Racism
   2. Sexism
4. Education
5. Environmentalism
6. Feminism
7. Freedom
   1. Slavery
8. Globalization
9. Human rights
10. Humanitarianism
11. Law
    1. Capital punishment
    2. Constitution
    3. Crime
    4. Justice
    5. Police
    6. Property
12. Peace
    1. Terrorism
    2. War
13. Pollution
14. Poverty
15. Privacy
16. Suicide

Business and economics

1. Business
   1. Corporation
   2. Finance
   3. Management
   4. Tax
2. Economics
   1. Employment
   2. Good
   3. Market
   4. Service
   5. Trade
3. Industry
   1. Hunting
   2. Agriculture
      1. Animal husbandry
      2. Domestication
      3. History of agriculture
   3. Construction
   4. Factory
   5. Fishing industry
   6. Manufacturing
   7. Mining
   8. Retail
4. Money
   1. Euro
   2. United States dollar

Media

1. Advertising
2. Broadcasting
3. Journalism
4. Magazine
5. Mass media
6. News
7. Newspaper
8. Publishing

Politics and government

1. Politics
   1. Colonialism
   2. Conservatism
   3. Imperialism
   4. Liberalism
   5. Nationalism
2. Government
   1. Anarchism
   2. Capitalism
   3. Communism
   4. Democracy
   5. Dictatorship
   6. Fascism
   7. Monarchy
   8. Socialism
   9. Theocracy
3. State
   1. Diplomacy
   2. Military
4. Specific political and governmental institutions
   1. European Union
   2. International Monetary Fund
   3. International Red Cross and Red Crescent Movement
   4. NATO
   5. Nobel Prize
   6. United Nations
   7. World Health Organization
   8. World Trade Organization

Social sciences

1. Social science
   1. Anthropology
   2. Political science
   3. Psychology
   4. Sociology

Disease

1. Allergy
2. Alzheimer's disease
3. Asthma
4. Blindness
5. Cancer
6. Common cold
7. Deafness
8. Dengue fever
9. Dental caries
10. Diabetes mellitus
11. Disease
12. Gastroenteritis
13. Influenza
14. Hypertension
15. Lower back pain
16. Malaria
17. Meningitis
18. Mental disorder
    1. Autism
    2. Schizophrenia
19. Parkinson's disease
20. Pneumonia
21. Sexually transmitted disease
    1. HIV/AIDS
22. Trauma (medicine)
    1. Bleeding
    2. Bone fracture
    3. Burn
    4. Heart attack
    5. Stroke
23. Tuberculosis

Health and fitness

1. Ageing
2. Drug
   1. Addiction
   2. Alcoholism
   3. Smoking
3. Medicine
4. Health
5. Nutrition
6. Obesity
7. Physician
8. Sanitation

Pharmaceuticals

1. Pharmaceutical drug
2. Birth control
3. Antibiotic
4. Vaccine

1. Science
2. History of science
3. Nature
4. Philosophy of science
5. Scientific method

Astronomy

1. Astronomy
2. Asteroid
3. Big Bang
4. Black hole
5. Galaxy
   1. Milky Way
6. Natural satellite
7. Orbit
8. Outer space
9. Physical cosmology
10. Planet
11. Solar System
    1. Sun
    2. Mercury
    3. Venus
    4. Earth
       1. Moon
    5. Mars
    6. Asteroid belt
    7. Jupiter
    8. Saturn
    9. Uranus
    10. Neptune
12. Star
13. Supernova
14. Universe

Biology

1. Biology
2. Life
   1. Death
   2. Extinction
3. Abiogenesis
4. Anatomy
   1. Nervous system
      1. Brain
   2. Gastrointestinal tract
   3. Circulatory system
      1. Blood
      2. Heart
   4. Immune system
   5. Kidney
   6. Liver
   7. Lung
   8. Muscle
   9. Skin
   10. Skeleton
5. Reproduction
   1. Female
   2. Male
   3. Pregnancy
   4. Sex
      1. Homosexuality
6. Botany
7. Cell
8. Ecology
   1. Ecosystem
9. Evolution
   1. Genetic drift
   2. Natural selection
10. Genetics
    1. DNA
    2. Gene
    3. Heredity
    4. RNA
11. Organism
    1. Animal
       1. Amphibian
       2. Bird
       3. Dinosaur
       4. Fish
       5. Insect
       6. Mammal
          1. Human
       7. Reptile
    2. Archaea
    3. Bacteria
    4. Eukaryote
    5. Fungus
    6. Plant
       1. Flower
       2. Seed
       3. Tree
    7. Algae
12. Photosynthesis
13. Species
14. Virus
15. Zoology

Chemistry

1. Chemistry
2. Biochemistry
3. Organic chemistry
4. Inorganic chemistry
5. Physical chemistry
6. Acid
7. Alloy
   1. Bronze
   2. Steel
8. Atom
9. Base
10. Catalysis
11. Chemical bond
12. Chemical compound
    1. Carbon dioxide
    2. Oil
    3. Salt
    4. Water
13. Chemical element
    1. Aluminium
    2. Carbon
    3. Copper
    4. Gold
    5. Hydrogen
    6. Iron
    7. Nitrogen
    8. Oxygen
    9. Silicon
    10. Silver
14. Chemical reaction
15. Crystal
16. Electrolysis
17. Glass
18. Ion
19. Metal
20. Mineral
21. Molecule
22. Periodic table

Earth science

1. Earth science
2. History of the Earth
3. Geology
   1. Earthquake
   2. Erosion
   3. Plate tectonics
   4. Rock
   5. Structure of the Earth
   6. Volcano
4. Atmosphere of Earth
   1. Climate
   2. Cloud
   3. Flood
   4. Global warming
   5. Meteorology
   6. Rain
   7. Tornado
   8. Tropical cyclone
   9. Weather
5. Oceanography

Physics

1. Physics
2. Particle physics
   1. Standard Model
   2. Subatomic particle
      1. Electron
      2. Neutrino
      3. Neutron
      4. Photon
      5. Proton
3. Classical mechanics
   1. Newton's laws of motion
4. Energy
   1. Kinetic energy
   2. Potential energy
5. Force
   1. Electromagnetism
   2. Gravitation
   3. Strong interaction
   4. Weak interaction
6. Heat
   1. Temperature
7. Light
   1. Electromagnetic radiation
   2. Optics
   3. Speed of light
8. Mass
9. Matter
   1. State of matter
10. Measurement
    1. Imperial and US customary measurement systems
    2. Metric system
11. Motion
12. Quantum mechanics
13. Sound
14. Space
15. Thermodynamics
16. Theory of relativity
17. Time
    1. Day
    2. Year
18. Vacuum

1. Technology
2. History of technology
3. Engineering
4. Artificial intelligence
5. Biotechnology
6. Genetic engineering
7. Nanotechnology
8. Nuclear technology
9. Tool

Energy

1. Electricity
2. Renewable Energy
3. Fossil Fuel
4. Hydropower
5. Nuclear power
6. Solar energy
7. Wind power

Electronics

1. Electronics
2. Battery
3. Incandescent light bulb
4. Integrated circuit
5. Semiconductor device
6. Transistor

Mechanical and structural engineering

1. Mechanical engineering
2. Engine
   1. Electric motor
   2. Internal combustion engine
   3. Jet engine
   4. Steam engine
3. Robot
4. Simple machine
5. Wheel
6. Arch
7. Bridge
8. Canal
9. Dam
10. House
11. Infrastructure
12. Road
13. Tower

Transportation

1. Transport
2. Aircraft
3. Automobile
4. Bicycle
5. Rail transport
6. Ship

Computing and Information Technology

1. Computing
2. Abacus
3. Calculator
4. Computer
5. Cryptography

Optical

1. Camera
2. Laser
3. Lens
4. Microscope
5. Telescope

Media and communication

1. Email
2. Internet
3. Mobile phone
4. Printing
5. Radio
6. Telecommunication
7. Telephone
8. Television
9. Video
10. World Wide Web

Navigation and timekeeping

1. Navigation
2. Calendar
3. Clock
4. Compass
5. Global Positioning System
6. Gyroscope
7. Pendulum
8. Radar
9. Sundial

Weapons

1. Weapon
2. Artillery
3. Bow and arrow
4. Firearm
5. Knife
6. Nuclear weapon
7. Sword
8. Submarine
9. Tank

Material and chemical

1. Candle
2. Fire
3. Explosive material
   1. Gasoline
   2. Gunpowder
4. Masonry
5. Metallurgy
6. Plastic
7. Rubber
8. Textile
9. Wood

Food and health

1. Electrocardiography
2. Magnetic resonance imaging
3. Pasteurization
4. Refrigeration
5. Stove
6. X-ray
7. Anesthesia

Space

1. Moon landing
2. Rocket
3. Satellite
   1. Hubble Space Telescope
4. Spaceflight
5. Space Shuttle
6. Space station
   1. International Space Station

1. Mathematics
2. History of mathematics
3. Algebra
4. Algorithm
5. Arithmetic
   1. Addition
   2. Subtraction
   3. Multiplication
   4. Division
   5. Fraction
   6. Percentage
   7. Exponentiation
   8. nth root
6. Combinatorics
7. Equation
8. Function
9. Geometry
   1. Angle
   2. Area
   3. Coordinate system
   4. Dimension
   5. Line
   6. Plane
   7. Point
   8. Shape
      1. Circle
      2. Conic section
      3. Polygon
      4. Polyhedron
      5. Sphere
      6. Triangle
   9. Volume

1. Linear algebra
   1. Matrix
2. Logarithm
3. Mathematical analysis
   1. Calculus
   2. Infinity
   3. Limit
   4. Probability
4. Statistics
5. Optimization
6. Game theory
7. Mathematical proof
8. Number
   1. Constant
   2. Digit
   3. Complex number
      1. Real number
         1. e
         2. Golden ratio
         3. Pi
         4. Rational number
            1. Integer
               1. Natural number
                  1. Prime number
   4. Number theory
9. Series
10. Set
11. Topology
12. Trigonometry
13. Variable