Otto Uldum is a maritime archaeologist and museum curator at the Viking Ship Museum in Roskilde, specialising in the excavation of shipwrecks. He led the excavation of Svælget 2 - the world's largest known medieval cog, built around 1410 and recovered during preliminary surveys for the Lynetteholm project in 2023. He has since directed the excavation of the warship Dannebroge, which exploded and sank during the Battle of Copenhagen on 2 April 1801, marking the first archaeological investigation ever conducted on a wreck from that battle.
Uldum announced the discovery of the warship Dannebroge 225 years after the Battle of the Roads - the first archaeological investigations ever of a wreck from this battle, with findings of human bones, cannonballs and two cannons.
Svælget 2, which Uldum excavated in 2023, was included in the Danish Agency for Culture and Palaces' Top 10 of the most important archaeological discoveries in 2025 after completed documentation.
The Viking Ship Museum revealed that Svælget 2 is the world's largest cog - approximately 28 meters long, 9 meters wide and with a cargo capacity of approximately 300 tons - built in the Netherlands around 1410.
Marine archaeologist Otto Uldum from the Viking Ship Museum presents significant shipwreck discoveries and the work of Danish marine archaeologists. Open for questions and discussion.
Four archaeologists present discoveries from Danish waters: a well-preserved 15th-century cog, a 2400-year-old boat, and an 8500-year-old Stone Age settlement. Wine included during the break.