Less than 1 km (½ mi) north of the cathedral, on the fjord, is the modern Vikingeskibsmuseet, containing five Viking ships sunk in the fjord 1,000 years ago. Submerged to block the passage of enemy ships, they were discovered in 1957. The painstaking recovery involved building a watertight dam and then draining the water from that section of the fjord. The splinters of wreckage were then preserved and reassembled. A deep-sea trader, warship, ferry, merchant ship, and
fierce 92½-foot man-of-war attest to the Vikings' sophisticated and artful boat-making skills.