1473
Copernicus Born in Torun
In a brick merchant's house on the Vistula, a boy was born who would eventually argue that the sun, not the earth, sat still at the center of things. He would study canon law in Italy, treat patients as a small-town canon in Frombork, and hold his heresy in reserve until his deathbed.
Aztec Tlatelolco Market at Full Scale
The great marketplace at Tlatelolco, Tenochtitlan's twin city on the adjacent island, operated daily with an estimated sixty thousand traders selling goods sourced from across Mesoamerica. Cacao beans served as standardized currency; specialized judges settled commercial disputes from covered booths. Spanish conquistadors who later witnessed the market in full operation compared it favorably to any they had seen in Europe. It was the largest commercial center in the Western Hemisphere.
Inca Terracing System Perfected
Inca engineers refined the agricultural terrace system called andenes that carved the steep Andean mountainsides into productive stepped fields stretching from valley floor to cloud forest. Sophisticated irrigation channels diverted glacial snowmelt through terraces growing maize, potatoes, and quinoa at altitudes where no other civilization on earth attempted agriculture. The system fed an empire of perhaps twelve million subjects and still functions in parts of highland Peru and Bolivia today.
Battle of Otlukbeli
Mehmed II crushed Uzun Hasan's Aq Qoyunlu army with Ottoman artillery and janissary discipline in eastern Anatolia. The defeat ended Aq Qoyunlu ambitions westward and secured the Ottoman eastern frontier. Uzun Hasan retreated to Tabriz and focused on diplomatic contacts with Venice. Ottoman supremacy in the region was now unchallenged.