På denne dag: 21. juli
Utforsk avgjørende hendelser, vitenskapelige sprang og historiske vendepunkter. Med kildekritisk merking for antikke og kalenderusatte datoer.
230: Historisk hendelse
Pope Pontian began his pontificate, succeeding Urban I.
365: Historisk hendelse
A large earthquake occurred near Crete, triggering a tsunami, and causing widespread destruction around the eastern Mediterranean region.
625: Historisk hendelse
Paulinus was consecrated as the first bishop of York by Justus, the archbishop of Canterbury.
905: Historisk hendelse
Louis III, Holy Roman Emperor, was captured and blinded during his attempt to restore Carolingian power over Italy by King Berengar I.
1378: Historisk hendelse
Unrepresented labourers revolted and violently took over the government of the Republic of Florence (depicted), demanding that they be granted political office.
1877: Historisk hendelse
Much of central Pittsburgh, Pennsylvania, was burned and looted during the Great Railroad Strike of 1877.
1918: Historisk hendelse
World War I: An Imperial German Navy U-boat opened fire on a small convoy of barges and defending aircraft near the American town of Orleans, Massachusetts.
1925: Historisk hendelse
American high-school biology teacher John T. Scopes was found guilty of violating Tennessee's Butler Act which forbade teaching evolution in class.
1946: Historisk hendelse
After weeks of unrest, rioters lynched Bolivian president Gualberto Villarroel, desecrating and hanging his corpse in the streets of La Paz.
1952: Historisk hendelse
An earthquake registering 7.3 Mw struck the southern San Joaquin Valley in California, causing 12 deaths and an estimated $60 million in property damage.
1959: Historisk hendelse
The inaugural International Mathematical Olympiad, the leading mathematical competition for pre-university students, began in Romania.
1960: Historisk hendelse
Sirimavo Bandaranaike (pictured) was sworn in as prime minister of Ceylon, becoming the world's first democratically elected female head of government.
1972: Historisk hendelse
The Troubles: The Provisional Irish Republican Army detonated twenty-two bombs throughout Belfast, Northern Ireland.
1977: Historisk hendelse
Libyan forces carried out a raid at Sallum, sparking a four-day war with Egypt.
1990: Historisk hendelse
The Taiwanese military ordered the deportation of dozens of illegal immigrants from mainland China in sealed boat holds, causing 25 deaths due to suffocation.
2007: Historisk hendelse
Harry Potter and the Deathly Hallows, the final book in the popular Harry Potter series by J. K. Rowling, was released and sold 15 million copies in its first 24 hours, making it the fastest-selling book in history.
2013: Historisk hendelse
Nour Ahmad Nikbakht, an Iranian diplomat in Yemen, was kidnapped by al-Qaeda militants and held hostage for the next two years.
2019: Historisk hendelse
People returning from anti–extradition bill protests in Hong Kong were attacked (pictured) by suspected triad members in Yuen Long, leaving 45 people injured.
🔍 Om kildene og historisk datering
Å tidfeste hendelser tusenvis av år tilbake i tid er en krevende historievitenskapelig oppgave. Før innføringen av den julianske kalenderen (45 f.Kr.) og den gregorianske kalenderen (1582) benyttet ulike sivilisasjoner (romere, grekere, kinesere, babylonere) vidt forskjellige kalendersystemer basert på månesykluser eller lokale embetsperioder.
Slik merker vi dateringene:
• ✓ Sikker datering: Dokumentert i samtidige protokoller, offisielle traktater eller etter standardiserte kalendersystemer.
• ⚠️ Usikker / estimert: Hendelsen er historisk reell, men datoen er tradisjonell, basert på senere krøniker eller lunisolare omregninger.
- Wikimedia Foundation – Wikipedia On This Day arkiver og historiske registre.
- Store norske leksikon (SNL) – Norsk og internasjonal historie, biografier og årstallsverifisering.
- Encyclopædia Britannica – Verifisering av antikke slag, fredsavtaler og statsdannelser.
- NASA Historical Logs & Science Missions – Romfartshistoriske datoer og oppskytningstelemetri.