In the icy depths of the Baltic Sea, a relic from a bygone era has resurfaced, sending ripples of excitement through the archaeological community. The royal flagship Gribshunden, belonging to Danish King Hans (also known as King John of Denmark), sank during the summer solstice of 1495 while en route from Copenhagen to Kalmar, Sweden. The ship was on a diplomatic mission to assert Hans’s claim to the Swedish throne in a meeting with Sten Sture the Elder. Tragically, the vessel caught fire and sank, taking with it a treasure trove of secrets—until now.
Discovered by sport divers in the 1970s, the Gribshunden shipwreck remained largely overlooked until archaeologists were alerted in 2000. The wreck, remarkably preserved in the Baltic’s oxygen-poor, high-salinity waters, has since revealed astonishing artifacts, including a breathtaking wooden figurehead of a dragon-like monster, likely the only surviving example from a 15th-century ship. But in August 2020, a discovery emerged that eclipsed even this find: a barrel buried in the ship’s silt-laden hull, containing the skeletal remains of a two-meter-long (6.56 feet) “sea monster.” DNA analysis by researchers at Lund University in Sweden identified the creature as an Atlantic sturgeon—a prehistoric fish teetering on the brink of extinction today. This find has unveiled not only a glimpse into a lost ecosystem but also a vivid snapshot of medieval power and propaganda.
A Prehistoric Giant from a Royal Pantry
The Atlantic sturgeon, a species that has roamed Earth’s waters for over 120 million years, is a true relic of the prehistoric world. With its long, upturned snout, four sensory barbels, and toothless mouth, this bony fish is armored with five rows of scutes—bony plates that shield its head and body. Lacking scales, it has an ancient, almost mythical appearance. Males can weigh up to 90 pounds (41 kg), while females may reach 160 pounds (72.5 kg). The largest recorded Atlantic sturgeon, caught in America’s Chesapeake Bay, measured a staggering 4.2 meters (14 feet) and weighed nearly 370 kilos (811 lbs). Known for its prized eggs, which are harvested for caviar, this species was a cornerstone of the fishing industry from colonial times until the early 20th century. However, overfishing and habitat loss led to its designation as an endangered species in 2012 by the National Oceanic and Atmospheric Administration, rendering it illegal to fish or harvest.
The Gribshunden’s exceptional preservation, owed to the Baltic Sea’s lack of oxygen and shipworms, has provided archaeologists with a rare window into late medieval Europe. The discovery of the sturgeon’s remains in a wooden barrel within the ship’s royal pantry was nothing short of electrifying. Dr. Stella Macheridis, a researcher at Lund University’s Department of Archaeology and Ancient History, described the find as “thrilling.” The team immediately recognized the remains as belonging to a sturgeon, thanks to its distinctive bony plate armor. Initially, they assumed it was a European sturgeon, common in the Baltic during the 15th century. But DNA analysis delivered a stunning revelation: this was an Atlantic sturgeon, a species now nearly extinct.
A Symbol of Power and Prestige
Why would King Hans transport a giant fish across the Baltic Sea? The answer lies in the politics of spectacle. The Atlantic sturgeon, with its monstrous size and prehistoric appearance, was more than a curiosity—it was a calculated display of power. Brendan P. Foley, a marine archaeologist at Lund University and project coordinator for the Gribshunden excavations, explained that the sturgeon was likely a “propaganda tool” meant to awe and impress Sten Sture and the Swedish court. In the medieval world, such a creature symbolized wealth, dominance, and divine favor, serving as a potent political instrument. The fish’s presence in the royal pantry suggests it was carefully preserved, perhaps to be presented as a diplomatic gift or a centerpiece at a grand feast.
Maria C. Hansson, the molecular biologist who conducted the DNA analysis, emphasized the discovery’s broader significance. “This find offers a glimpse of what the Baltic Sea looked like before human interference,” she said. The identification of the Atlantic sturgeon as part of the region’s ancient ecosystem is a critical piece of ecological history. Hansson even suggested that, through advancements in underwater DNA analysis, scientists might one day “recreate what it looked like previously,” breathing new life into this ancient species.
A Legacy on the Brink
The Gribshunden’s sturgeon is a rare archaeological treasure, offering insights into medieval European politics, religion, and economics. Sturgeon remains are exceptionally uncommon in archaeological contexts, making this discovery a landmark in maritime history. The fish’s presence aboard a royal vessel underscores its status as a symbol of high prestige, reserved for kings and nobility. Yet, the Atlantic sturgeon’s story is also a cautionary tale. Once abundant, this 120-million-year-old species is now critically endangered, its survival threatened by centuries of exploitation.
The Gribshunden shipwreck continues to captivate researchers and the public alike, revealing the ambitions and artistry of a medieval king while shedding light on a lost world beneath the waves. As archaeologists delve deeper into the wreck, each find—from the dragon figurehead to the sturgeon’s skeleton—paints a richer picture of a pivotal moment in history. The “sea monster” of King Hans’s ship may not be revived in the flesh, but its discovery has reanimated a forgotten chapter of our past, reminding us of the delicate balance between humanity and the natural world.