What type of 600-year-old, 'exceptionally well-preserved' trading vessel was discovered off the coast of Denmark in January 2026?

The exceptionally well-preserved 600-year-old trading vessel discovered off the coast of Denmark in January 2026 was identified as a cog. Found in the Øresund Strait, also known as the Sound, between Denmark and Sweden, this medieval merchant ship has been named Svælget 2. Maritime archaeologists from Denmark's Viking Ship Museum unearthed the wreck during surveys for the new Lynetteholm coastal district in Copenhagen. Buried under layers of sand and silt for centuries, the ship's remarkable condition offers a rare glimpse into 15th-century maritime history.

Cogs were the dominant cargo vessels of the Middle Ages, revolutionizing long-distance trade across Northern Europe. Characterized by a single mast with a square sail and a broad, flat-bottomed hull, their design prioritized cargo capacity and stability over speed, making them ideal for transporting large quantities of goods. This particular cog, measuring approximately 28 meters long, 9 meters wide, and 6 meters high, with an estimated cargo capacity of 300 tons, is the largest of its type ever discovered.

Dendrochronological analysis, which examines tree rings in the ship's timber, dates its construction to around 1410. The discovery of Svælget 2 provides unprecedented insights into medieval shipbuilding techniques, the sophisticated supply chains involved in its construction—with timber sourced from both Poland and the Netherlands—and the highly organized trading economy of the era. Its size indicates a structured system where merchants had established markets for bulk commodities like salt, timber, bricks, and staple foods, transforming trade to include everyday goods rather than just luxuries. The exceptional preservation, including parts of its rigging and even a brick galley for cooking, offers a unique opportunity to understand life onboard these "medieval super ships."