It’s no ordinary shipwreck that maritime archaeologists have uncovered off the coast of Copenhagen, Denmark. Hidden for more than six centuries, the towering vessel has been identified as the largest known medieval cargo ship, a revelation that could offer new insights into shipbuilding of the era.

 

The ship was discovered in Øresund, or the Sound, a strait between Denmark and Sweden, at a depth of more than 40 feet. It was unearthed by archaeologists from Denmark’s Viking Ship Museum amid seabed surveys for Copenhagen’s forthcoming Lynetteholm district. After sweeping away layers of sand and silt, the team found a ship, known as a cog, measuring about 91 feet long, 29 feet wide, and 19 feet high, with a cargo capacity of 300 tons.