Lost Medieval ‘Super Ship’ Found Near Copenhagen

A 600-Year-Old Giant Emerges from the Seafloor

Danish archaeologists have uncovered a remarkable piece of maritime history: the remains of the world’s largest known medieval cargo ship, hidden beneath the waters off Copenhagen for more than six centuries. The vessel, known as Svælget 2, was discovered during seabed surveys connected to Copenhagen’s Lynetteholm development project, revealing a ship that once played a crucial role in European trade.

A ‘Super Ship’ of the Middle Ages

Built in 1410, Svælget 2 is a cog — a type of cargo ship that formed the backbone of medieval commerce. Measuring approximately 92 feet long, 30 feet wide, and 20 feet high, the ship could carry an estimated 330 tons of goods. According to the Viking Ship Museum in Roskilde, it represents the largest cog ever discovered anywhere in the world and showcases the most advanced shipbuilding techniques of its time.

Tree-ring analysis revealed the vessel was constructed using timber from Pomerania in modern-day Poland and the Netherlands, underscoring the interconnected nature of medieval Europe’s shipbuilding and trade networks.

Unusually Well-Preserved Details

What makes the discovery even more extraordinary is its state of preservation. Protected for centuries by sand and silt, the ship still contains rare features such as intact rigging and a brick-built galley where sailors cooked over an open hearth — a notable comfort for life at sea. Archaeologists also recovered everyday personal items, including shoes, combs, dishes, and rosary beads, offering an intimate glimpse into sailors’ daily lives.

A Window Into Medieval Trade

While no cargo remains were found, researchers believe the ship likely transported salt, cloth, or lumber. The size and construction of Svælget 2 illustrate how ships like this transformed trade, making it possible to move everyday goods across long distances — not just luxury items. Experts say further study of the artifacts may reveal even more about life aboard one of the Middle Ages’ most impressive merchant vessels.