Vasa: The Mismatched Rulers of a Sunken Empire

Welcome to Pod-This and The Discovery Hour. Today we are looking at the seventeenth-century Swedish warship Vasa with maritime historian Henry. It is incredible to see how pure royal ambition doomed this ship before it even launched. How did the most terrifying warship in the Baltic become such a catastrophic failure?

And how was it resurrected three hundred and thirty-three years later as the world's greatest time capsule?

Hearing about Henrik Jacobsson standing on that raw oak timber with a royal demand for seventy-two massive guns shows the pressure he was under. King Gustavus Adolphus wanted a ship that was a massive statement of power. The king was locked in a brutal war with Poland-Lithuania. He needed a powerhouse to spearhead his expansion in the Baltic.

So, he ordered this enormous double-gundeck vessel to show his military dominance. Changing the design of a warship mid-construction sounds like a recipe for disaster. That is especially true when you consider they were working without any blueprint drawings.

The master shipwright, Henrik Hybertsson, signed the contract back in January sixteen twenty-five. He used the traditional Dutch bottom-based method. This meant they built the hull entirely by experience and rule of thumb. They didn't have a single piece of paper or a scale model to guide them. That sounds incredibly risky.

It gets worse because the carpenters weren't even using the same measurements. Different teams were literally using different rulers. One group measured in Swedish feet, which was about twenty-nine point seven centimeters. The Dutch crew used Amsterdam feet, which was shorter, at twenty-eight point three centimeters.

Because of that mismatch, the port side of the ship was built heavier than the starboard side. They were building a lopsided giant. Even so, they still spent a fortune on making it look spectacular. They commissioned master artists like Mårten Redtmer to carve nearly five hundred sculptures. The entire hull was painted in vivid reds and golds.

It was designed to terrify enemies and glorify the monarch. The Vasa was heavily armed, brightly painted, and fundamentally lopsided. The only question left was whether it would actually float.

It is terrifying to watch thirty men almost capsize a ship while it's still at the dock. How does a naval commander see that happen and still let the vessel sail?

Vice Admiral Klas Fleming was paralyzed by political pressure. King Gustavus Adolphus was away fighting in Poland, and he was sending aggressive letters demanding his new flagship join the fleet. Fleming simply didn't have the political courage to tell the king the ship wasn't safe. Royal impatience overrode basic physics.

The design itself must have been dangerously unstable from the start to roll over like that. The builders were trying to create a floating fortress like no one had ever seen. The ship was meant to carry one hundred and forty-five sailors and three hundred soldiers into battle.

To give them overwhelming firepower, they crowded the upper decks with heavy bronze cannons. This created a staggering broadside weight of five hundred and eighty-eight pounds from one side alone. That is an immense amount of artillery riding high above the water.

They built a top-heavy weapon and then invited the entire city of Stockholm to watch it perform. The launch was supposed to be a grand display of Swedish military power. They even left the lower gunports wide open to fire a salute as they departed. That prideful decision turned the maiden voyage into an immediate disaster.

It's hard to wrap your head around how quickly it failed. The ship sank after sailing only thirteen hundred meters, in a light breeze, right in front of the public and foreign ambassadors. The wind was remarkably gentle that afternoon. But as the ship cleared the bluffs near Tegelviken, a sudden gust caught the sails.

The hull heeled violently to port. The open gunports dipped below the waterline, and the Baltic Sea rushed into the lower gundeck. The crowds on the shore were watching a catastrophe unfold in real time. They were close enough to see the sailors struggling on the deck. The vessel went down just one hundred and twenty meters from the shoreline.

It settled into the harbor mud at a depth of thirty-two meters. Thirty people died in the disaster.

The pride of the Swedish navy was at the bottom of the harbor. King Gustavus Adolphus wanted heads to roll. You would assume the Privy Council immediately threw the captains or the builders into a dungeon. They certainly tried. But the inquest on September fifth, sixteen twenty-eight, at the Royal Palace ran into a wall of finger-pointing.

Admiral Carl Carlsson Gyllenhielm faced a room where every living suspect had a perfect alibi. The shipwrights were the ones who actually built that unstable hull. Surely they couldn't escape responsibility for a ship that capsized in a light breeze.

The new master shipwright, Hein Jacobsson, testified he followed the exact dimensions approved by the king himself. He even widened the ship by one foot five inches during construction. He couldn't expand it further without scrapping the entire frame. The builders blamed the design, and the crew blamed the builders.

Someone had to be held accountable for the loss of the state flagship. The commercial partner, Arendt de Groote, told the council that only God knew why the ship sank. Despite a massive public inquiry, no one was punished. The blame was conveniently pinned on the original shipwright, Henrik Hybertsson, because he was already dead.

That feels like a complete political whitewash. The crown just walked away from its most expensive military asset. They didn't walk away from the valuable bronze guns. Between sixteen sixty-three and sixteen sixty-five, Albreckt von Treileben and Andreas Peckell used a primitive diving bell to recover over fifty cannons from the dark water.

Diving bells in the seventeenth century were incredibly limited. They couldn't just lift the guns out without altering the wreck. They ripped her apart to get inside. Those early salvagers tore up thirty cartloads of weather deck planking. They destroyed the upper sculptures just to clear a path for the heavy bronze barrels.

The inquest protected the living politicians, while the salvagers scarred the ship itself. The inquiry closed without a single sentence passed. The hull was left broken and plundered in the Stockholm mud.

That plug of black oak Franzén pulled up changed the entire search. How could wood sit in harbor mud for three hundred years without completely rotting away?

The Baltic Sea lacks Teredo navalis. That is the wood-destroying shipworm that eats wrecks in other oceans. This parasite simply cannot survive in brackish water. So the environment protected it. But wasn't Stockholm harbor also heavily polluted by the twentieth century?

The toxic, oxygen-starved water actually prevented microorganisms from destroying the wood. The pollution in the harbor created a perfect preservation chamber. It is wild that urban waste helped save a royal flagship. Once Franzén pinpointed the wreck in nineteen-fifty-six, how did they lift something that massive?

They had to dig beneath it. Between nineteen-fifty-nine and nineteen-sixty-one, divers conducted over thirteen hundred hazardous dives in total darkness. Working blind under a thousand-tonne hull sounds like a nightmare. How did they cut through the clay?

Divers used high-pressure water jets to carve six tunnels directly under the keel. Then they threaded thick steel cable slings through those gaps to connect the hull to surface pontoons. So they built a lifting cradle completely by touch. When did the ship finally reach the surface?

The hull broke the surface on April twenty-fourth, nineteen-sixty-one. Crowds lined the shores to watch the timbers rise. After three centuries, it just reappears. What did the salvage teams find once they began digging out the interior mud?

They recovered the tragic remains of at least fifteen people trapped during the sinking. They also found four hundred and twelve gun tackle and rigging blocks. That seems like an enormous amount of equipment for one vessel. It is unprecedented. That total outnumbers the rigging finds from the Mary Rose and La Belle combined. Did anything softer survive, like clothing or canvas?

Archaeologists recovered six of the ship's ten original sails stored in the orlop deck. These canvas pieces are the earliest archaeological example we have of reef points. So the sails actually show how seventeenth-century sailors managed heavy winds. They could adjust the canvas area without replacing the whole sail.

We have gone from a catastrophic sinking in front of a horrified crowd to a triumphant resurrection from the mud. The Vasa was finally back in the sunlight, yielding a treasure trove of history. But the moment it hit the air, a new countdown to destruction began.

The moment the hull broke the surface in nineteen sixty-one, the clock started ticking. Wood that survived three centuries in anaerobic mud was suddenly exposed to oxygen and light. How do you stop a massive warship from the sixteen-hundreds from just drying out and crumbling into dust?

You drown it in chemicals for nearly two decades. The museum sprayed the hull with polyethylene glycol, or P-E-G, for seventeen years. This wax-like chemical soaked into the wood cells. It pushed the water out and took its place so the timbers wouldn't shrink or warp as they dried.

The wax stabilized the structure, but then the air itself triggered a quiet disaster inside the wood. The ship is literally eating itself from the inside out. It is generating tons of sulfuric acid as it reacts with the modern atmosphere. In two thousand two, researchers discovered the hull contained over two tonnes of pure sulfuric acid.

The remaining sulfides were creating another one hundred kilograms of acid every single year. Two tonnes of acid inside the structure is terrifying. It means the air in the museum is dissolving the artifact. The iron bolts used during the initial salvage made it worse by rusting and feeding that chemical reaction.

To halt the damage, technicians spent seven years, from twenty-eleven to twenty-eighteen, replacing those old bolts. They used high-alloy stainless steel, which is a material normally reserved for the extreme environments of the oil and gas industry. The wood itself is still softening under its own massive weight, despite the new bolts.

The wood is losing its internal strength. Because of that, the museum announced a one hundred and fifty million Swedish kronor project in late twenty-twenty-three. They are building a completely new replacement cradle and an internal support skeleton over four years to keep the ship from collapsing. It feels like a supreme irony.

King Gustavus Adolphus built this ship to project absolute power. Today it is famous for the opposite reason. It even inspired the term Vasa-syndrome in management literature to describe completely botched projects. It is a design failure turned into a triumph of preservation.

Over forty-five million visitors have stood beneath its towering stern since nineteen sixty-one. They come to marvel at a ship that never fought a single battle. The legacy of the Vasa is not as a weapon of war, but as an accidental, unparalleled museum of life in the sixteen-hundreds.

It is a site that requires cutting-edge, twenty-first-century science just to keep it from dissolving into acid and dust.

The Vasa was born of pure hubris. You can see it in everything from the thirty men running across the deck to the mismatched rulers that doomed her from the start. Yet, those exact flaws created the world's greatest time capsule. It is the ultimate irony. The mass that dragged her down to the seabed preserved a perfect snapshot of sixteen twenty-eight.

Now, it takes our most advanced twenty-first-century chemistry just to keep her from dissolving into acid. Her victory was historical rather than military. A royal failure turned into an accidental treasure. Henry, thank you for guiding us through this epic salvage and survival story.

Share this episode with anyone who loves history's strangest twists. Until next time, keep questioning and keep discovering.