Czech historian | Hussite Theological Faculty, Charles University, Faculty of Arts, Charles University in Prague | Chomutov: April 4, 1974 - Prague: December 15, 1989

April 4, 1971 - Moscow: June 23, 1971 | Onintze Salazar | April 4, 1971 - Moscow: June 23, 1971

Azerbaijani scientist | Jubilee medal "100 years of Heydar Aliyev (1923-2023)". (2024), Baku State University 100th anniversary medal, Taraggi Medal (2005)

Italian physicist | Sapienza University of Rome | Rome: April 4, 1965 - Cambridge: September 26, 2020 | Alessandro Vespignani | Rome: April 4, 1965

French mathematician | University of Paris-Sud (1988) | Paris: April 4, 1964 - Lake Placid: December 26, 1931 | Yves Laszlo | Paris: April 4, 1964 - Lake

German physicist and historian of science | Paul Bunge Prize (1992), Kurt-Hartwig-Siemers-Wissenschaftspreis (1989) | University of Hamburg | Bad Nauheim

April 4, 1960 - Venice: July 22, 1790 | Horacio Potel | April 4, 1960 - Venice: July 22, 1790

American academic philosopher | Graduate Theological Union (1989), IBTS (1982), Illinois Valley Central High School, Westmont College (1980), Pacific School of

Russian scientist | Honoured Physician of the Russian Federation | Bashkir State Medical University | Oktyabrsky District: April 4, 1957 - Nassau: March 8, 1887

Polish mathematician | University of Gdańsk | Koszalin: April 4, 1955 - Budapest: May 7, 1974 | Zdzisław Dzedzej (Zdzislaw Dzedzej) | Koszalin: April 4, 1955

Spanish ophthalmologist and researcher | Complutense University of Madrid | Caracas: April 4, 1953 - January 1, 2008 | Jorge Alió (Jorge Alio) | Caracas

Professor | Saint George's Cross (2025), Ramon Llull Award (2003) | University of Barcelona | Ibiza: April 4, 1949 - Saint Petersburg: March 22, 1911 | Isidor

American physicist | Sakurai Prize (1999), Pomeranchuk Prize (2013), Fellow of the American Physical Society, ICTP Dirac Medal (2016), Lilienfeld Prize (2006)

American mathematician from Hong Kong | Crafoord Prize, National Medal of Science (1997), Crafoord Prize in Mathematics (1994), Oswald Veblen Prize in Geometry

Italian mathematician and politician (1949-) | Naples: April 4, 1949 - Rome: December 29, 1948 | Guido Trombetti | Naples: April 4, 1949 - Rome: December 29, 1948

Kazakhstani scientist | North Kazakhstan Region: April 4, 1948 - Tokyo: August 19, 1917 | Nursulū Böketova (Nursulu Boketova) | North Kazakhstan Region

Australian physicist (1946–2021) | Fellow of the American Association for the Advancement of Science (2008), Foreign Member of the Royal Society (2015)

Austrian chemist | University of Vienna | Vienna: April 4, 1945 - Heusenstamm: December 9, 2005 | Thomas Hoffmann-Ostenhof | Vienna: April 4, 1945

Syrian-German social and political scientist and university lecturer | Officer's Cross of the Order of Merit of the Federal Republic of Germany (1995) | Goethe

Italian mathematician | University of Trieste | Ljubljana: April 4, 1943 - Moscow: February 3, 1994 | Aljoša Volčič (Aljosa Volcic) | Ljubljana: April 4

Norwegian mathematician | University of Oslo, University of Michigan, Norwegian College of General Sciences | Eidsvoll Municipality: April 4, 1941 - August 10, 2016

Russian academic | Moscow University's Department of Philosophy | Baku: April 4, 1932 - Moscow: February 1, 1892 | Zaid Orudzhev | Baku: April 4, 1932

Hungarian philosopher from Romania (1928–2022) | Political Statement in the Article “A Ceaușescu-korszak után” (After the Ceaușescu Era) of the 1988/1

American mathematician (1926–2002) | Carol Karp Prize (1978), Guggenheim Fellowship | Pomona College, University of California, Berkeley | Alhambra: April 4

Russian mathematician (1926-2019) | MSU Faculty of Mechanics and Mathematics | Tula: April 4, 1926 - Moscow: January 14, 2019 | Evgeny Volkov | Tula: April 4

Slovenian philosopher | Brežice: April 4, 1923 - April 26, 2020 | Miloš Poljanšek (Milos Poljansek) | Brežice: April 4, 1923 - April 26, 2020

French historian of science (1915-2004) | George Sarton Medal (1975), Kenneth O. May Prize | École normale supérieure de Saint-Cloud | L'Échelle: April 4

French writer and film director (1914-1996) | Prix Goncourt (1984), Austrian State Prize for European Literature (1989), Grand prix du théâtre (1983) | The

American mathematician in the mid-twentieth century | Paul R. Halmos - Lester R. Ford Awards, Rhodes Scholarship (1932) | New College, Princeton University

Soviet chemist (1910–1987) | Order of the Badge of Honour, Order of Friendship of Peoples, Hero of Socialist Labour, Order of Lenin, Order of the Red Banner of Labour

Aerodynamic scientist (1909-1968) | Academician of the Chinese Academy of Sciences (1957) | California Institute of Technology, Peking University | Rongcheng

Swedish chemist and microbiologist (1903-1981) | Agricultural University College, Stockholm University | April 4, 1903 - Uppsala: August 21, 1981 | Ragnar

Swedish philosopher (1902–1991) | Moscow: April 4, 1902 - Uppsala: October 27, 1991 | Konrad Marc-Wogau | Moscow: April 4, 1902 - Uppsala: October 27, 1991

German psychologist and philosopher (1898-1972) | Ludwig-Maximilian-University in Munich | Munich: April 4, 1898 - Munich: March 15, 1972 | Philipp Lersch

Ukrainian literary scholar (1894–1977) | Guggenheim Fellowship (1955) | Oleksandriia: April 4, 1894 - Heidelberg: April 18, 1977 | Dmytro Chyzhevsky

Danish-born American physicist | Tom W. Bonner Prize in Nuclear Physics (1967), Fellow of the American Physical Society (1931) | Odense University | Holstebro

soviet engineer (1892–1957) | Medal "For Valiant Labour in the Great Patriotic War 1941–1945", Order of Lenin, Stalin Prize, Order of the Red Banner of

Finnish photographer, journalist, scientist, writer and Esperantist (1892–1985) | Helsinki: April 4, 1892 - Espoo: April 11, 1985 | Vilho Setälä (Vilho

Latvian physical chemist (1891-1985) | Order of Lenin, Order of the Red Banner of Labour, Medal "For Valiant Labour in the Great Patriotic War 1941–1945"

Italian mathematician (1885–1967) | Fellow of the Econometric Society (1937), Fellow of the American Statistical Association | University of Naples Federico II

Belzec extermination camp survivor | Dębica: April 4, 1881 - Toronto: October 6, 1977 | Rudolf Reder | Dębica: April 4, 1881 - Toronto: October 6, 1977

Polish chemist (1879-1929) | Kraków: April 4, 1879 - Poznań: April 7, 1929 | Antoni Korczyński (Antoni Korczynski) | Kraków: April 4, 1879 - Poznań: April 7, 1929

British chemist and biochemist (1878–1939) | Cothenius Medal (1937), Fellow of the Chemical Society, Fellow of the Royal Society, Davy Medal (1938)

Polish inventor (1875-1945) | Warsaw: April 4, 1875 - Mauthausen concentration camp: March 13, 1945 | Kazimierz Prószyński (Kazimierz Proszynski) | Warsaw

American philosopher (1875–1980) | Harvard University | Newton Highlands: April 4, 1875 - Pittsford: February 26, 1980 | Wilmon Henry Sheldon | Newton

Finnish museum curator and art historian (1872–1933) | Knight First Class of the Order of the White Rose of Finland, Knight of the Order of St. Olav

Scottish entrepreneur and inventor of the Ross rifle (1872–1942) | Eton College, Trinity College | Balnagown Castle: April 4, 1872 - St. Petersburg: June 29, 1942

English mathematician (1868–1948) | Newnham College, Streatham and Clapham High School | Brighton: April 4, 1868 - London: June 10, 1948 | Philippa Fawcett

University of Königsberg, University of Bern, University of Zurich | April 4, 1863 - Chicago: January 1, 1982 | Peter Fireman | April 4, 1863 - Chicago

April 4, 1860 - Camberwell: March 30, 1929 | Curt Abel-Musgrave | April 4, 1860 - Camberwell: March 30, 1929

French writer (1858–1915) | Saintour Prize (1904) | University of Caen Normandy | Bazoches-au-Houlme: April 4, 1858 - 15th arrondissement of Paris: September 27, 1915

Hungarian engineer (1853–1942) | Budapest University of Technology and Economics | Vienna: April 4, 1853 - Budapest: November 29, 1942 | Károly Zipernowsky

Swedish chemist (1848–1937) | Lund University | Årstad parish: April 4, 1848 - Sankt Matteus: January 1, 1937 | Peter Klason | Årstad parish: April 4, 1848

American chemist (1847–1935) | Harvard University, Harvard College | Boston: April 4, 1847 - Prides Crossing: October 31, 1935 | Charles Loring Jackson

Swiss physicist (1846-1929) | Davy Medal (1878) | University of Geneva | Geneva: April 4, 1846 - Paris: July 27, 1929 | Raoul Pictet | Geneva: April 4, 1846

French mathematician (1842–1891) | École Normale Supérieure | Amiens: April 4, 1842 - Paris: October 3, 1891 | Édouard Lucas (Edouard Lucas) | Amiens

American inventor | Portage County: April 4, 1842 - May 17, 1899 | Marvin Stone | Portage County: April 4, 1842 - May 17, 1899

Belgian electrical engineer | Officer of the Legion of Honour, National Inventors Hall of Fame (2006), Commander of the Order of Leopold | Jehay: April 4, 1826

engineer and inventor (1823–1883) | honorary doctorate of the University of Glasgow, Bakerian Lecture (1871), Albert Medal (1874), Honorary doctorate from

Imperial Academy of Medical Surgery | April 4, 1822 - 13th arrondissement of Paris: March 14, 1976 | Iosif Ravich | April 4, 1822 - 13th arrondissement of

American mechanical engineer (1821–1868) | National Inventors Hall of Fame (2006) | New York: April 4, 1821 - New York City: December 25, 1868 | Linus Yale

American minister and activist (1819–1878) | Harvard Divinity School, Harvard University | United States: April 4, 1819 - Somerset: May 30, 1878 | William

American mathematician (1809–1880) | Fellow of the American Academy of Arts and Sciences, Foreign Member of the Royal Society (1852) | Harvard University

Danish politician | Metropolitanskolen | Copenhagen: April 4, 1802 - Frederiksberg: December 22, 1873 | Carl Mundt | Copenhagen: April 4, 1802 - Frederiksberg

Japanese scientist | Kōriyama: April 4, 1791 - Edo: January 1, 1861 | Asaka Gonsai | Kōriyama: April 4, 1791 - Edo: January 1, 1861

French applied mathematician | 72 names on the Eiffel Tower | École polytechnique, École des Ponts ParisTech | Valenciennes: April 4, 1790

Hungarian mathematician, poet (1785–1831) | Bistrița: April 4, 1785 - Posmuș: December 16, 1831 | Ferenc Teleki | Bistrița: April 4, 1785 - Posmuș

Italian mathematician (1782-1863) | Casa del Salvatore, University of Naples Federico II | Naples: April 4, 1782 - Naples: June 20, 1863 | Vincenzo Flauti

French astronomer | 12742 Delisle, Mons Delisle, Delisle, Fellow of the Royal Society | Delisle scale | Paris: April 4, 1688 - Paris: September 11, 1768

German alchemist (1596-1635) | Böblingen: April 4, 1596 - August 19, 1635 | Daniel Mögling (Daniel Mogling | Florentinus de Valentia | Theophilus

Italian writer | Modena: April 4, 1546 - London: March 21, 1616 | Giacomo Castelvetro | Modena: April 4, 1546 - London: March 21, 1616

German astronomer and mathematician (1538–1612) | University of Coimbra, Roman College | Bamberg: April 4, 1538 - Rome: February 6, 1612 | Christopher

French linguist, astronomer, diplomat and professor (1510–1581) | Collège Sainte-Barbe | Barenton: April 4, 1510 - Paris: September 16, 1581 | Guillaume