Wreck of Dannebroge flagship found in Copenhagen Harbour

Maritime archaeologists from Denmark's Viking Ship Museum announced the identification of the wreck of the Dannebroge, the Danish flagship that sank during the Battle of Copenhagen on April 2, 1801. The site was located approximately 15 meters below the surface in Copenhagen Harbour during seabed surveys ahead of the construction of the new artificial island Lynetteholm.

Otto Uldum, the maritime archaeologist leading the excavation, stated:

“We have found Dannebroge and the remains of those who never made it ashore after the battle.”

The identification was supported by dendrochronological dating of the timber, which corresponds to the ship's construction period at the turn of the 19th century, and by hull dimensions matching historical records.

Artifacts and human remains

The team has recovered a range of artifacts despite challenging conditions of low visibility and heavy silt. Finds include two large cannons, uniform insignia, leather shoes, clay pipes, cannonballs, and bar shot. These items provide direct physical evidence of the intense fighting that took place in the harbor.

Of particular significance is the recovery of human remains, including a lower jawbone and several ribs. These are believed to belong to one of the roughly 19 crew members who remained unaccounted for after the ship exploded and sank. Morten Johansen, head of maritime archaeology at the Viking Ship Museum, noted that while the battle has been documented extensively in historical accounts, this is the first time physical remains from the Dannebroge have been studied archaeologically. The finds offer new perspectives on the experience of sailors aboard a warship under heavy bombardment.

Historical context of the 1801 battle

The Dannebroge sank during the Battle of Copenhagen on April 2, 1801. Britain, engaged in a long conflict with Napoleonic France, saw the League of Armed Neutrality (Denmark, Russia, Sweden, and Prussia) as a threat to its naval supremacy and access to Baltic naval stores.

A British fleet commanded by Admiral Sir Hyde Parker, with Vice-Admiral Horatio Nelson leading the main attack, was sent to neutralize the Danish-Norwegian fleet. The Dannebroge, under Commodore Olfert Fischer, occupied a central position in the Danish defensive line and came under heavy fire. After sustaining prolonged bombardment, the ship caught fire and exploded when flames reached the powder magazine.

The British achieved a decisive victory. Twelve Danish ships were captured or destroyed, and Denmark was forced to withdraw from the League of Armed Neutrality. The coalition soon collapsed, further accelerated by the assassination of Tsar Paul I of Russia. This outcome secured Britain's northern flank during the Napoleonic Wars.

Significance of the discovery

The wreck provides a rare physical record of early 19th-century naval warfare. Analysis of the ship's construction and damage may yield new data on the resilience of wooden hulls under cannon fire. The personal artifacts and human remains add a human dimension to an event often discussed primarily in strategic terms.

The excavation is time-sensitive, as the site lies in an area affected by the Lynetteholm construction project. Archaeologists are working to document and recover material before further development impacts the seabed.

As work continues, the Dannebroge is expected to provide additional insights into the final hours of the ship and its crew, bridging the gap between high-level naval history and the individual experiences of those who served aboard.