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Theodor Kaluza
Theodor Kaluza (Theodor Franz Eduard Kaluza, 1885–1954) was a German mathematician and physicist whose 1921 proposal to unify gravitation and electromagnetism in five-dimensional spacetime became Kaluza–Klein theory.
Theodor Kittelsen
Theodor Severin Kittelsen (1857–1914) was a Norwegian painter and illustrator best known for his illustrations of Asbjørnsen and Moe's folktales and mythical creatures like trolls and the plague figure Pesta.
Theodor Kocher
Emil Theodor Kocher was a Swiss surgeon in Bern who in 1909 became the first surgeon to win the Nobel Prize in Physiology or Medicine, for thyroid surgery.
Theodor Kolde
Theodor Kolde, from 1910 Theodor Ritter von Kolde, was a German Lutheran church historian (1850–1913) who held the historical theology chair at Erlangen and founded Bavarian church-history research.
Theodor Kuen
Theodor Kuen, born 1859, was a German mathematician and Munich secondary-school teacher whose single 1884 publication on constant-curvature surfaces gave his name to the Kuen surface.
Theodor Lessing
Theodor Lessing (1872–1933) was a German-Jewish philosopher and publicist who taught in Hannover, coined "Jewish self-hatred" in his 1930 book, and was assassinated by Nazi agents in exile.
Theodor Meron
Theodor Meron (born 1930, Poland) is an international law jurist, Holocaust survivor, former Israeli diplomat, NYU professor, author of the humanization thesis, and ICTY/Mechanism president who presided over the Krstic genocide appeal.
Theodor Molien
Theodor Molien (Fedor Eduardovich Molin, 1861 to 1941) was a Baltic German mathematician in Dorpat and Tomsk known for Molien's formula, which counts polynomial invariants of a finite group.
Theodor Mommsen
Theodor Mommsen (1817–1903), German historian, jurist, and epigrapher; author of Römische Geschichte and Römisches Staatsrecht, director of the Corpus Inscriptionum Latinarum, and 1902 Nobel Literature laureate, the only historian besides Churchill to win.
Theodor Morell
Theodor Morell (1886–1948), German urologist and Hitler's personal physician from 1936/37 to April 1945; gave over 1,000 injections and 92 medications, built a pharma empire, and died unprosecuted at Tegernsee.
Theodor Otto Diener
Theodor Otto Diener (1921-2023), Swiss-born American USDA plant pathologist, discovered the viroid in 1971, the smallest infectious agent, protein-free circular RNA causing potato spindle tuber disease; National Medal of Science and Wolf Prize recipient.
Theodor Scheimpflug
Theodor Scheimpflug (1865–1911) was an Austrian naval officer and inventor who developed balloon-based aerial photogrammetry and formulated the optics of the Scheimpflug condition for tilted lenses.
Theodor Schneider
Theodor Schneider (1911–1988) was a German mathematician who solved Hilbert's seventh problem in his 1934 doctoral thesis under Carl Ludwig Siegel, establishing the Gelfond–Schneider theorem, and whose 1957 monograph shaped Diophantine approximation theory.
Theodor Schwann
Theodor Schwann (1810–1882), German physiologist, co-founded cell theory with Schleiden in 1839, discovered pepsin, proved yeast fermentation is a life process, and gave his name to the Schwann cell.
Theodor Spieker
Theodor Spieker (1823–1913) was a German schoolteacher and mathematician in Potsdam whose widely reprinted geometry textbook inspired the young Einstein, and whose name survives in the Spieker center and Spieker circle.
Theodor Storm
Theodor Storm (1817–1888) was a German writer and jurist of literary realism, known for poems and novellas set on the North Sea coast of Schleswig-Holstein.
Theodor von Brand
Theodor von Brand (1899–1978) was a German-American parasitologist who pioneered the biochemistry of parasites and headed a research section at the National Institutes of Health.
Theodor von Oppolzer
Theodor von Oppolzer (1841–1886) was an Austrian astronomer and geodesist at the University of Vienna, best known for the Canon der Finsternisse, a catalog of about 13,000 eclipses.
Theodor W. Adorno
Theodor W. Adorno (1903-1969), German philosopher, sociologist, and music theorist of the Frankfurt School; author of Dialectic of Enlightenment, Minima Moralia, Negative Dialectics; theorist of the culture industry and negative dialectics.
Theodor W. Hänsch
Theodor W. Hänsch is a German experimental physicist who pioneered laser precision spectroscopy and the optical frequency comb, winning a quarter of the 2005 Nobel Prize in Physics.
Theodor Wagner-Jauregg
Theodor Wagner-Jauregg (1903–1992) was an Austrian chemist, son of Nobel laureate psychiatrist Julius Wagner-Jauregg, known for the Wagner-Jauregg reaction, the first (4+2) cycloaddition involving an aromatic nucleus.
Theodor Wilhelm Engelmann
Theodor Wilhelm Engelmann (1843–1909) was a German physiologist who worked in Utrecht and Berlin, proved with bacteria that photosynthesis occurs in chloroplasts, and championed the myogenic theory of the heartbeat.
Theodor Zahn
Theodor Zahn (1838–1933) was a German Lutheran theologian and New Testament scholar at Erlangen who argued the New Testament canon existed by the end of the first century.
Theodor Zincke
Ernst Carl Theodor Zincke (1843–1928) was a German organic chemist, professor at Marburg from 1875 to 1913, known for the Zincke reaction and other named reactions.
Theodora (singer)
Theodora (Lili-Théodora Mbangayo Mujinga, born 2003, Lucerne) is a French-Congolese singer nicknamed Boss Lady, known for the 2024 viral bouyon hit "KONGOLESE SOUS BBL," the Mega BBL album, and four 2026 Victoires de la Musique.
Theodora (Θεοδώρα) (wife of Justinian I)
Theodora (Θεοδώρα, c. 497–548) was Byzantine empress as wife of Justinian I, crowned 1 April 527. A former Hippodrome actress, she held firm during the 532 Nika revolt, favored Miaphysitism, and is depicted in the San Vitale mosaic.
Theodora Kantakouzene
Theodora Kantakouzene (Θεοδώρα Καντακουζηνή) was a Byzantine princess, daughter of Emperor John VI Kantakouzenos, married in 1346 to the Ottoman bey Orhan to seal a military alliance.
Theodore "T-Bag" Bagwell
Theodore "T-Bag" Bagwell, aka Theodore Bagwell, is a fictional Prison Break character played by Robert Knepper: a Fox River inmate, white supremacist group leader, and sexual predator in all five seasons.
Theodore A. McKee
Theodore A. McKee is an American jurist on the Third Circuit Court of Appeals, appointed by Bill Clinton in 1994 and chief judge from 2010 to 2016.
Theodore Alan Fulton
Theodore Alan Fulton, born around 1941 in Washington, Iowa, is an American physicist who with Gerald Dolan first built the single-electron transistor at Bell Labs in 1987.