1416
Poggio Rediscovers Lucretius
The papal secretary Poggio Bracciolini found a copy of Lucretius's De Rerum Natura, an Epicurean poem arguing that everything was made of atoms and gods did not meddle in human affairs, moldering in a German monastery. He had it copied. The poem re-entered European thought and began quietly eroding the medieval worldview.
Zheng He's Fleet Visits Aden and East Africa
The fourth treasure voyage reached the Arabian port of Aden and the Swahili coast of East Africa, exchanging Chinese porcelain and brocaded silk for frankincense, myrrh, and African exotica including giraffes that Ming courtiers joyfully identified as the mythical qilin, an omen of imperial virtue. Chinese diplomatic reach now spanned the entire Indian Ocean basin, from the Yangtze shipyards to the coral ports of Mogadishu.
Venice Defeats Ottoman Fleet at Gallipoli
Pietro Loredan's galleys caught the Turkish fleet at anchor and burned most of it. It was the first major Ottoman naval defeat and reassured a nervous Serenissima that the Aegean was still, for now, a Venetian lake. The reassurance would last about forty years. The victory secured Venetian access to Black Sea grain and the Aegean islands, though Ottoman naval growth made any advantage fragile.
Prince Henry Begins Organizing African Exploration
A year after Portugal's capture of the Moroccan port of Ceuta, Prince Henry began organizing systematic exploration of the West African coast from his base at Lagos in the Algarve. He dispatched caravels into waters no European had charted, seeking gold, slaves, and a sea route past the Muslim world. The prince who would never sail himself became the organizational genius behind a full century of Portuguese maritime expansion southward.
Jerome of Prague Burned
A year after Jan Hus, his fellow Bohemian reformer Jerome of Prague was condemned by the Council of Constance and burned at the same spot. A witness at the execution reported that Jerome sang hymns until the flames made singing impossible. Two Czech reformers had now been martyred in one year.