Pilatre de Rozier, the Marquis d'Arlandes, and the November Afternoon in Paris When Humans First Left the Ground

On November 21, 1783, two men climbed into a wicker gallery beneath an enormous blue-and-gold balloon at the Chateau de la Muette in Paris and flew. Jean-François Pilâtre de Rozier and François Laurent d’Arlandes, the Marquis d’Arlandes, stayed aloft for approximately 25 minutes, covering roughly five miles over the rooftops of Paris. No human being had ever done it before.

Who Built the Balloon That Changed Everything

The balloon belonged to two brothers from Annonay, a small paper-manufacturing town in the Ardèche region of France, about 50 miles southwest of Lyon. Joseph-Michel Montgolfier, the older brother at 42, was the restless, inventive one. His younger brother Étienne, five years his junior, ran the business side and kept the enterprise from collapsing while Joseph was lost in his own experiments.

In the winter of 1782, Joseph held a paper bag open over a fire and watched it rise toward the ceiling. He and Étienne concluded, incorrectly, that the combustion of wool and straw produced a special buoyant gas they called Montgolfier gas. The actual lift force was simply hot air. That misconception didn’t stop them from building something that worked.

They constructed progressively larger test envelopes, filling them with hot air from fires burning wool and straw. By spring of 1783, they were ready for a public demonstration.

The First Public Balloon Launch: June 4, 1783

On June 4, 1783, before a crowd that included members of the local assembly at Annonay, the Montgolfiers launched their first public balloon. The spherical envelope of paper-coated linen held roughly 28,000 cubic feet of hot air. Witnesses estimated it reached approximately 3,000 feet and drifted about a mile and a half before coming down in a field.

Word traveled to Paris, to the Academy of Sciences, and to Versailles. The king wanted a demonstration.

Three Animals and a Scientific Experiment: September 19, 1783

Before any human went aloft, genuine scientific uncertainty remained about what altitude would do to a living body. Would the air be unbreathable? Would a sudden pressure change be fatal?

For the Versailles demonstration on September 19, 1783, three animals were loaded into a wicker cage attached to the balloon: a sheep, a duck, and a rooster. The sheep served as the best available proxy for a human. The duck, as a natural flier, was a control - if the duck survived and the sheep didn’t, the altitude wasn’t the problem. The rooster flew at low altitude only, providing another data point.

The balloon carried them for eight minutes at roughly 1,500 feet, coming down about two miles from the launch site. The sheep and duck were unharmed. The rooster had a broken leg - from being stepped on by the sheep during landing, witnesses reported. Not the altitude’s fault.

The animals had survived. The next question was unavoidable.

Who Would Go First - and Why It Almost Went to Condemned Criminals

King Louis XVI offered a practical solution: use condemned criminals. They were scheduled to die anyway. If they died in the air, nothing of consequence was lost. If they survived, they would earn their freedom.

Pilâtre de Rozier was 26 years old, curator of the king’s natural history cabinet, and deeply opposed to this idea. He argued with an intensity that belongs to young, brilliant, slightly reckless people who have decided to do something unprecedented: the honor of being the first humans to leave the earth should belong to free men who chose it willingly. The king relented.

De Rozier would fly. Joining him was d’Arlandes, an army officer who had followed the balloon experiments with mounting excitement.

What the Tethered Test Flights Revealed

Through October 1783, de Rozier flew the balloon on tethered lines to learn what operating it actually required. It was not a passive ride.

The fire burning at the base of the balloon had to be constantly managed. Bundles of straw had to be fed into the furnace to maintain altitude. When the fire dwindled, the balloon descended. When it burned too hot, sparks landed on the fabric of the envelope and set it smoldering. Wet sponges were carried to beat out small fires before they spread. Flying this machine was real work - the entire journey demanded active fire management while watching the fabric above for the first sign of trouble.

By November, de Rozier was ready.

The Flight: November 21, 1783

The afternoon was cold. A crowd of several hundred gathered on the grounds of the Chateau de la Muette in the Bois de Boulogne at the western edge of Paris. The balloon - nearly 70 feet tall and over 40 feet across, painted in deep blue and gold, decorated with the signs of the zodiac and the royal cipher of Louis XVI - strained against its tethering ropes.

De Rozier and d’Arlandes climbed into the gallery. Each carried a bundle of straw, a pitchfork for feeding the fire, and a wet sponge for beating out sparks.

Just before 2 o’clock, the ropes were released.

The crowd went silent.

D’Arlandes wrote afterward that as Paris fell away beneath him, he felt a strange and total calm - not terror, but something closer to awe so complete that fear had no room left in him. They climbed to roughly 3,000 feet. The Seine traced through the city below like a silver thread. The whole of Paris spread out beneath them.

The work continued throughout the flight. D’Arlandes fed straw into the furnace while de Rozier watched the envelope above, calling for the sponge when sparks caught the fabric. At one point d’Arlandes looked up and saw a hole burning through the lower section of the balloon. He beat it out. De Rozier told him to get back to the fire.

After approximately 25 minutes, de Rozier stopped feeding the furnace and let the fire die back. The balloon descended gently into a field near the Butte-aux-Cailles neighborhood, roughly five miles from where they had launched.

They had flown.

Benjamin Franklin Watched From the Crowd

Among those watching from the Bois de Boulogne that afternoon was Benjamin Franklin, then 77 years old and serving as the American minister to France. He wrote a meticulous letter about what he witnessed to Sir Joseph Banks, president of the Royal Society in London.

When someone nearby asked Franklin what use this balloon business could possibly be, his answer has become one of the defining lines in aviation history:

“What use is a newborn baby?”

Franklin understood exactly what he was watching. The first flight wasn’t a mail route or a military tool - it was proof that the thing could be done. What it would eventually be used for wasn’t knowable in that field that November afternoon. The knowing would come.

Ten Days Later: Jacques Charles and the Hydrogen Balloon

What Franklin may not have anticipated was how fast.

On December 1, 1783 - just ten days after the Montgolfier flight - a physicist named Jacques Alexandre César Charles launched a hydrogen balloon from the Tuileries Gardens in Paris. Charles had been working independently of the Montgolfiers, using an entirely different technology: sealed hydrogen gas instead of open hot air, a valve for releasing gas during descent, and ballast bags for trim control. It was, technically, a more sophisticated design.

Charles flew with his companion Nicolas-Louis Robert to a village approximately 25 miles from Paris. He landed, let Robert out, and then flew again - solo - climbing to over 10,000 feet. Rising above the horizon line, he watched the sun set a second time in a single day.

When he landed, he announced he would never fly again. He never did. He said afterward that some moments cannot be revisited without losing something essential. He had seen what no human had ever seen, and he believed - correctly - that he would never have that precise experience again.

De Rozier’s Final Flight: June 15, 1785

Pilâtre de Rozier was not built the same way. He was not done.

Within months, crossing the English Channel had become the defining challenge of the age. The English had seen the French fly, and de Rozier wanted to be the first across the water.

He designed a new type of balloon: a hot air balloon nested inside a hydrogen balloon, with the idea that the hot air section could manage altitude while the hydrogen provided sustained lift. His colleagues thought the design was catastrophically dangerous - a hydrogen envelope with an open fire suspended inside it. Some argued with him. Some walked away from the project entirely.

De Rozier pushed forward.

On June 15, 1785, de Rozier and his companion Pierre Romain launched from Boulogne-sur-Mer on the French coast, aimed for England. Approximately 30 minutes into the flight, witnesses on shore watched fire break out. The hydrogen ignited. The balloon fell.

Jean-François Pilâtre de Rozier was 31 years old. Both men were killed.

The first human being to fly had become, twenty months later, the first aviator to die in an aircraft accident.

A Name That Went Around the World

His hybrid balloon concept did not die with him. The combination of hot air and hydrogen lift became known as the Rozière balloon, named directly for him.

It was a Rozière balloon that Bertrand Piccard and Brian Jones flew when they completed the first nonstop circumnavigation of the globe by balloon in 1999 - 216 years after the flight that killed its inventor. His name went around the world.

Why This Matters

The aviation lineage that runs from de Rozier to Kitty Hawk to the cockpits of modern aircraft begins in that field near the Butte-aux-Cailles on a cold November afternoon in 1783. No instruments. No training manual. No radio call. They had a fire, a bundle of straw, and a wet sponge. They did not fully understand the physics of what was keeping them up. They flew anyway.

That refusal to stay on the ground regardless of the uncertainty is not a Wright Brothers invention. It is not a 20th-century development. It is as old as the first time a person looked at the sky and decided to find out.

Key Takeaways

• November 21, 1783 - Pilâtre de Rozier and d’Arlandes made the first free human flight in a Montgolfier hot air balloon over Paris, covering five miles in approximately 25 minutes
• The Montgolfier brothers mistakenly believed smoke had buoyant properties; the actual mechanism was simply hot air - but the error didn’t stop the balloon from flying
• Flying the Montgolfier balloon was active work: constant fire management, straw feeding, and spark suppression with wet sponges throughout every flight
• Benjamin Franklin, watching from the crowd, responded to skeptics with: “What use is a newborn baby?” - recognizing the flight as proof of concept, not utility
• De Rozier, the first human to fly, became the first aviator killed in an aircraft accident on June 15, 1785, when his hybrid hydrogen-hot air balloon caught fire over the English Channel
• The Rozière balloon design he pioneered was used by Piccard and Jones to complete the first nonstop balloon circumnavigation of the globe in 1999