The Hjortspring boat () is a vessel designed as a large canoe, from the Scandinavian Pre-Roman Iron Age. It was built circa 400–300 BC. The hull and remains were rediscovered and excavated in 1921–1922 from the bog of Hjortspring Mose on the island of Als in Sønderjylland, southern Denmark. The boat is the oldest find of a wooden plank ship in Scandinavia and it closely resembles the thousands of petroglyph images of Nordic Bronze Age ships found throughout Scandinavia. The vessel is a clinker-built wooden boat of more than length overall, long inside, and wide. Ten thwarts that could have served as seats, span the boat with room for two persons each; this suggests space for a crew of at least 20 who propelled the boat with paddles. The boat would have weighed an estimated , making it easily portable by its crew. Associated finds When found, the boat contained a great quantity of weapons and armour, including 131 shields of the Celtic type, 33 well-crafted Shield bosses, 138 iron spearheads, 31 bone or antler spearheads, 11 single-edged iron swords, and the remains of several mailcoats. Two of the swords were deliberately bent, a practice associated with Iron Age rituals. The largest of the spearheads is a massive long. The find also contained bowls, boxes, blacksmith's tools, and other everyday goods. The sinking of the vessel in the bog has been interpreted as a deliberate votive offering. This is reinforced by the presence of a dismembered horse placed beneath the boat at the time of burial along with a lamb, a calf, and two dogs. Numerous graves have been discovered in Denmark from this time period containing similar grave goods and sacrificed horses, dogs, lambs, cows, other animals, and human beings. Construction The Hjortspring boat was constructed of lime (linden) wood planks sewn together with cord of lime bark, spruce root, or rawhide. Pitch was used to caulk and coat the seams to make the boat watertight. A long dugout log forms the bottom plank, which also acts as the keel, with two additional planks, or strakes, attached on both sides to fashion the hull. This allows the large vessel to sit high in the water and to traverse shallow waters, even with a full crew and heavy load. Hollowed timbers were used to create the distinct stem and stern-posts. These stem pieces, along with the bottom plank, extend forward