TITLE: May 15 in History: 7 Days That Changed the World
1. 1252 – Pope Innocent IV Authorizes Torture in Ad Extirpanda
On May 15, 1252, Pope Innocent IV issued one of the most consequential — and notorious — papal bulls of the medieval era. Ad extirpanda formally permitted the use of torture by the Inquisition against suspected heretics, codifying a practice that would shape European jurisprudence for centuries. The bull placed strict (if often ignored) limits on the methods: torture could not cause loss of life or limb, and a confession had to be repeated freely afterward to be valid. The document reflected a hardening of the Church's stance against the Cathars and other dissenting movements spreading across southern France and northern Italy. By delegating enforcement to civil authorities while retaining ecclesiastical oversight, Ad extirpanda created a template of state-sanctioned coercion that historians still study as a turning point in the development of inquisitorial procedure.
2. 1602 – Bartholomew Gosnold Names Cape Cod
When English explorer Bartholomew Gosnold sailed his small bark Concord into the waters off what is now Massachusetts on May 15, 1602, his crew was so overwhelmed by the abundance of cod they hauled aboard that the captain named the hooked peninsula Cape Cod. It was one of the earliest English voyages to make landfall in New England, predating the Mayflower by nearly two decades. Gosnold's expedition wasn't just about fishing. He scouted the region for potential colonization, established a brief outpost on Cuttyhunk Island, and returned to England with sassafras root — then prized as a medicinal cure-all. His detailed reports helped inspire later colonial ventures, and Gosnold himself sailed again to America in 1607 as a founder of Jamestown, where he died of disease just months after arrival.
3. 1718 – The Puckle Gun: World's First Machine Gun Patented
James Puckle, a London lawyer turned inventor, received a patent on May 15, 1718, for what is widely regarded as the world's first machine gun. The "Puckle Gun" was a tripod-mounted flintlock revolver with a hand-cranked cylinder, capable of firing nine rounds per minute — three times the rate of a skilled musketeer. Curiously, the patent specified that the gun would fire round bullets at Christians and square bullets at Turks, on the theory that square bullets would inflict more grievous wounds upon "infidels." Despite its mechanical ingenuity, the Puckle Gun was a commercial failure. Investors balked, manufacturing tolerances of the era couldn't reliably support its complex mechanism, and the British military passed on it entirely. Yet Puckle's patent stands as a striking premonition of the rapid-fire weapons that would transform warfare a century and a half later with the Gatling gun and Maxim machine gun.
4. 1862 – Lincoln Establishes the U.S. Department of Agriculture
In the middle of the Civil War, Abraham Lincoln found time on May 15, 1862, to sign legislation creating the United States Department of Agriculture. At a moment when the Union was bleeding men and treasure on battlefields from Virginia to Tennessee, Lincoln was also laying the groundwork for the postwar transformation of the American economy. He would later refer to the USDA as "the people's department," reflecting his belief that the federal government had a duty to support the farmers who fed the nation. The timing was no accident. That same year, Lincoln signed the Homestead Act and the Morrill Land-Grant Act, all part of a coordinated vision to open the American interior to small farmers and bring scientific agriculture to ordinary people. The USDA would grow from a tiny office distributing seeds and gathering statistics into one of the largest cabinet departments — touching everything from food safety to forest management to school lunches.
5. 1928 – Mickey Mouse Debuts in Plane Crazy
Long before Steamboat Willie made him a household name, Mickey Mouse made his quiet debut on May 15, 1928, in the silent animated short Plane Crazy. Inspired by Charles Lindbergh's transatlantic flight the year before, the cartoon featured Mickey building a rickety airplane and taking Minnie for a chaotic, romantic joyride. It was a test screening — the film initially failed to attract a distributor. Walt Disney and animator Ub Iwerks weren't discouraged. They went on to produce The Gallopin' Gaucho and then the synchronized-sound landmark Steamboat Willie, which premiered that November and made Mickey an overnight sensation. Plane Crazy was eventually re-released with a soundtrack in 1929, but its May 15 sneak preview marks the true birth of the most recognizable cartoon character in the world — and the seed of an entertainment empire.
6. 1940 – The McDonald Brothers Open Their First Restaurant
On May 15, 1940, brothers Richard and Maurice McDonald opened a modest barbecue restaurant in San Bernardino, California. It bore little resemblance to the global icon it would become — carhops served customers in their cars, and the menu featured roughly forty items including ribs, sandwiches, and tamales. The brothers wouldn't pioneer their revolutionary "Speedee Service System," focused on hamburgers and rapid assembly-line production, until 1948. That San Bernardino location quietly rewrote the rules of the food industry. By stripping the menu, eliminating waiters, and standardizing every step of food preparation, the McDonalds invented modern fast food. When traveling milkshake-machine salesman Ray Kroc visited in 1954 and saw the operation in action, he convinced them to franchise — and eventually bought them out, building the McDonald's Corporation that today operates more than 40,000 restaurants in over 100 countries.
7. 1963 – Gordon Cooper Concludes Project Mercury Aboard Faith 7
NASA launched the sixth and final crewed Mercury mission, Faith 7, on May 15, 1963, with astronaut L. Gordon Cooper aboard. Over the next 34 hours, Cooper completed 22 orbits of Earth — far longer than any previous American spaceflight — and became the first American to spend an entire day in space. He was also the last American to fly into orbit alone, a distinction he holds to this day. The mission was nearly derailed by cascading electrical failures in the final hours, forcing Cooper to manually align his capsule for re-entry using only the stars and his wristwatch. He splashed down within four miles of his target carrier, demonstrating both human skill and the spacecraft's resilience. Faith 7 closed Project Mercury and cleared the path for the two-man Gemini program, which would prove out the rendezvous, docking, and spacewalking techniques essential for Apollo's eventual journey to the Moon.
Threads Across Time
It's striking how a single date on the calendar can stitch together such different chapters of human ambition — from a medieval pope wrestling with heresy, to a sea captain naming a fishhook of land, to a hamburger stand that would feed billions, to an astronaut alone in orbit guiding himself home by starlight. Each May 15 belonged to people who had no idea their actions would echo through centuries. History isn't a series of disconnected moments; it's a quiet conversation across time, and every date on the calendar holds another verse of it.