1820 – 1830s

Events in the 1820s 17

• 1743 – 1826 Thomas Jefferson 3rd President — author of the Declaration of Independence Thomas Jefferson (Apr 13, 1743 – Jul 4, 1826) was the 3rd President 1801-1809, principal author of the Declaration of Independence, and architect of the Louisiana Purchase. He died on the same day as John Adams, July 4, 1826.
• 1746 – 1828 Francisco Goya Romanticism · Spain Francisco Goya (March 30, 1746 – April 16, 1828) was a Spanish Romantic painter and printmaker whose work ranges from royal portraits to nightmarish visions. His Saturn Devouring His Son and The Third of May 1808 are icons of Western art.
• 1755 – 1824 Friedrich Schiller German playwright and poet Schiller wrote influential dramas such as William Tell, exploring freedom, morality, and political ideals in Romantic literature.
• 1770 – 1827 Ludwig van Beethoven Classical & Romantic titan German composer whose 9 symphonies, 32 piano sonatas and string quartets bridged the Classical and Romantic eras. He composed his greatest works while profoundly deaf.
• 1786 – 1826 Carl Maria von Weber Early Romantic opera pioneer German composer who established German Romantic opera with Der Freischütz, paving the way for Wagner.
• 1788 – 1824 Lord Byron English Romantic poet Byron became a leading Romantic figure through emotionally intense poetry and a dramatic public persona.
• 1795 – 1821 John Keats English poet Keats wrote some of the most celebrated Romantic poetry focusing on beauty, mortality, and imagination.
• 1797 – 1828 Franz Schubert Romantic Lieder master Austrian composer who died at 31 yet left an extraordinary legacy: over 600 Lieder, 8 symphonies including the Unfinished, and sublime chamber music.
• 1820 – 1840 Antarctica confirmed as a continent The seventh continent discovered by three expeditions Between 1820 and 1840, Russian, British, and American expeditions independently confirmed the existence of a massive continental landmass at the South Pole. Fabian von Bellingshausen, Edward Bransfield, and Nathaniel Palmer all sighted the Antarctic coast in 1820. The continent was confirmed by the Wilkes Expedition in 1840, completing the map of the Earth's major landmasses.
• 1820 – 1865 Laws of thermodynamics Energy is conserved and entropy always increases The first law of thermodynamics (energy is conserved, Joule and Mayer, 1840s) and the second law (entropy of a closed system always increases, Clausius, 1865) were the most fundamental laws of physics discovered in the 19th century. They explained the limits of steam engines, showed that perpetual motion machines are impossible, and introduced the concept of entropy — disorder that only ever increases in a closed system.
• 1820 Oersted — electromagnetism Electricity and magnetism are the same force In 1820, Hans Christian Oersted of Copenhagen discovered that an electric current in a wire deflected a nearby compass needle — demonstrating for the first time that electricity and magnetism are related phenomena. The discovery launched the entire field of electromagnetism and within months led Ampere to formulate the mathematical laws of the magnetic field. It was the first step toward electric motors, generators, and all electrical technology.
• 1821 – 1881 Fyodor Dostoevsky Russian novelist Dostoevsky explored psychology, morality, and existential conflict in works like Crime and Punishment.
• 1824 – 1896 Fourier and Arrhenius — the greenhouse effect Atmospheric gases trap heat and warm the planet Joseph Fourier first described the greenhouse effect in 1824, noting that the atmosphere traps heat. John Tyndall identified the specific gases responsible (CO2, water vapour) in 1859. Svante Arrhenius in 1896 calculated that doubling atmospheric CO2 would raise global temperatures by 5–6°C — the first quantitative climate model and a prescient warning about fossil fuel burning.
• 1824 – 1884 Bedřich Smetana Czech national composer Czech composer whose cycle of symphonic poems Má vlast (My Homeland) including Vltava became the symbol of Czech national identity.
• 1825 – 2026 First Railways of the World The year the railway arrived, country by country The first public railway opened in each country, from the Stockton and Darlington in 1825 to lines that did not arrive until the 21st century. Horse-drawn lines are included where they came first. Plotted together, the dates trace the spread of industrialisation and empire across the world.
• 1825 – 1899 Johann Strauss II Waltz King Austrian composer known as the Waltz King, famous for The Blue Danube and the operetta Die Fledermaus. He defined the sound of 19th-century Vienna.
• 1828 – 1910 Leo Tolstoy Russian novelist Tolstoy wrote War and Peace and Anna Karenina, blending historical realism with deep moral philosophy.