July 15: Holidays, Historical Events, Famous Birthdays & Zodiac Sign

July 15 has a way of bringing opposing sides together—or forcing them apart. In 1410, the combined armies of Poland and Lithuania shattered the powerful Teutonic Order at the Battle of Grunwald, one of the largest clashes of medieval Europe. Centuries later, in 1799, a French soldier stumbled upon a dark slab in the Egyptian mud near Rosetta—a rock we now know as the Rosetta Stone, which unlocked hieroglyphics and gave humanity a window into antiquity. On the same day in 1975, Cold War adversaries set aside tensions when an American Apollo module linked up with a Soviet Soyuz craft, allowing astronauts and cosmonauts to clasp hands in orbit.

It's also a day of notable beginnings and endings. William Boeing incorporated his aviation company in Seattle in 1916, and exactly 90 years later, in 2006, a little messaging platform called Twitter went live. In 1834, Spain formally dissolved its notorious Inquisition after nearly 356 years. Meanwhile, the date carries deep significance for Ukraine, which observes Statehood Day, and for the European Union, which dedicates this date to victims of the global climate crisis.

The arts world claims this date as well. The Dutch master Rembrandt van Rijn was born on July 15, 1606, his mastery of light and shadow still captivating audiences. The literary imagination is well represented too, with Irish novelist and philosopher Iris Murdoch arriving in 1919, and Canadian physicist Bertram Brockhouse in 1918, whose neutron-scattering work earned a Nobel Prize.