April21
Ancient World
753 BC
Ancient World
The Founding of Rome

Roman legend held that Romulus, after killing his twin brother Remus in a dispute over where to build their city, plowed a sacred furrow around the Palatine Hill to mark Rome's boundary. Ancient scholars, notably Marcus Terentius Varro, calculated this founding to April 21, 753 BC, a date Romans celebrated annually as the Parilia festival.

Medieval
1481
Culture
Botticelli Paid for Sistine Frescoes

Pope Sixtus IV commissioned a team of Florentine and Umbrian masters, including Botticelli, Perugino, and Ghirlandaio, to fresco the side walls of his new chapel with scenes from the lives of Moses and Christ. The payment records from this period document the intense, competitive collaboration among Renaissance Italy's greatest painters working side by side on scaffolding.

19th Century
1816
Culture
Charlotte Brontë Is Born

Charlotte Brontë grew up in the isolated parsonage at Haworth alongside siblings Emily, Anne, and Branwell, inventing elaborate fantasy worlds together as children. She went on to publish 'Jane Eyre' in 1847 under the pseudonym Currer Bell, a novel whose fierce, plain-spoken heroine and moral seriousness startled and captivated Victorian readers.

1836
World War II
Battle of San Jacinto

Shouting "Remember the Alamo!" and "Remember Goliad!", roughly 900 Texan soldiers surprised General Antonio López de Santa Anna's encamped force near the San Jacinto River. The battle itself lasted only about 18 minutes of fighting, though the slaughter and pursuit continued for hours; Santa Anna was captured the next day and forced to sign treaties recognizing Texan independence.

World Wars Era
1926
Politics
Elizabeth II Is Born

Born at 17 Bruton Street in Mayfair to the Duke and Duchess of York, Elizabeth was not expected to become queen until her uncle Edward VIII's abdication in 1936 thrust her father onto the throne. She ascended in 1952 upon her father's death and reigned until her own death in 2022, becoming Britain's longest-reigning monarch.

Cold War & Space Age
1970
Space
Apollo 13 Crew Returns Safely

After an oxygen tank ruptured en route to the Moon on April 13, forcing the crew to abandon the lunar landing and shelter in the cramped lunar module as a lifeboat, Apollo 13's astronauts endured frigid temperatures and dwindling supplies for four days. Ground controllers improvised carbon dioxide scrubbers and navigation fixes, and the crew splashed down safely in the South Pacific, turning a near-disaster into one of NASA's most celebrated engineering rescues.

1975
World War II
Khmer Rouge Encircle Phnom Penh

As American-backed government forces crumbled, Khmer Rouge troops closed in on Phnom Penh in the final week before its fall on April 17, 1975, with the following days consumed by the mass evacuation the new regime forced upon the city's roughly two million residents. The takeover initiated Pol Pot's radical agrarian revolution, which would kill an estimated 1.7 to 2 million Cambodians through execution, starvation, and forced labor.

Modern
1994
Politics
Last White-Only South African Election Campaign Nears End

In the tense final week before South Africa's first democratic elections on April 26–29, 1994, campaign rallies swelled across the country as millions of Black South Africans prepared to vote for the first time. The election, which brought Nelson Mandela to the presidency, marked the definitive end of apartheid's legal architecture after decades of struggle, boycott, and negotiation.