COPENHAGEN, Denmark (AP) — More than 200 years after being sunk by Adm. Horatio Nelson and the British fleet, a Danish warship has been discovered on the seabed of Copenhagen Harbor by marine archaeologists.Working in thick sediment and almost zero visibility 15 meters (49 feet) beneath the waves, divers are working against the clock to unearth the 19th-century wreck of the Dannebroge before it becomes a construction site in a new housing district being built off the Danish coast.Denmark’s Viking Ship Museum, which is leading the monthslong underwater excavations, announced its findings on Thursday, 225 years to the day since the Battle of Copenhagen in 1801.AdvertisementAdvertisement“It’s a big part of the Danish national feeling,” said Morten Johansen, the museum’s head of maritime archaeology.A great deal has been written about the battle “by very enthusiastic spectators, but we actually don’t know how it was to be onboard a ship being shot to pieces by English warships and some of that story we can probably learn from seeing the wreck, Johansen said.In the Battle of Copenhagen, Nelson and the British fleet attacked and defeated Denmark’s navy as it formed a protective blockade outside the harbor.Thousands were killed and wounded during the brutal hourslong naval clash, considered one of Nelson’s “great battles.” The intention was to force Denmark out of an alliance of Northern European powers, including Russia, Prussia and Sweden.AdvertisementAdvertisementAt the center of the fighting was the Danish flagship, the Dannebroge, commanded by Commodore Olfert Fischer.The 48-meter (157-foot) Dannebroge was Nelson’s main target. Cannon fire tore through its upper deck before incendiary shells sparked a fire aboard.“(It was) a nightmare to be on board o …