On this day in the Roman calendar, citizens marked Consualia, an ancient agrarian festival dedicated to Consus, the god of the granary. Underground altars, normally sealed, were uncovered for the occasion, and chariot races were held in the Circus Maximus. The festival reflected Rome's deep agricultural roots even as the city grew into an imperial power.
In the days around August 21, 1791, enslaved Africans in the French colony of Saint-Domingue rose up in a massive, coordinated rebellion, burning plantations across the Northern Plain. The revolt, inspired partly by a clandestine Vodou ceremony led by Dutty Boukman, set off thirteen years of warfare that ended with Haiti's independence in 1804. It stands as history's only slave revolt that led directly to the founding of a nation.
Vincenzo Peruggia, an Italian handyman who had once worked at the Louvre, hid overnight in a storage closet and simply lifted Leonardo da Vinci's masterpiece off its hooks the next morning, wrapping it in a smock and walking out the staff exit. The painting's absence went unnoticed for over 24 hours. Peruggia kept it hidden in his Paris apartment for two years before attempting to sell it to a Florence art dealer, believing he was repatriating stolen Italian treasure.
Following a territorial referendum in which Hawaiian voters overwhelmingly approved statehood, President Eisenhower signed the official proclamation making Hawaii the 50th state of the Union. It came just seven months after Alaska's admission, closing a chapter of continental and Pacific expansion that had begun over a century earlier. The move reflected Hawaii's growing strategic and economic importance following World War II.
Portugal signed an accord recognizing the independence of Guinea-Bissau, formalizing what nationalist guerrillas of the PAIGC had already unilaterally declared the previous year. The recognition came months after Portugal's own Carnation Revolution toppled its authoritarian regime, which had exhausted itself fighting costly colonial wars in Africa. Guinea-Bissau's independence marked a key moment in the broader collapse of the Portuguese empire.
By the early 1980s, geneticist Barbara McClintock's once-controversial theory of transposable genetic elements, or "jumping genes," discovered decades earlier through painstaking maize studies, was being confirmed across many organisms including bacteria and fruit flies. Her insight that genes could move within a genome and regulate other genes reshaped molecular biology. The following year, in 1983, she received the Nobel Prize in Physiology or Medicine, decades after her original discovery.
