Rock art in Sweden in the context of "Longship"

Longships (Old Norse: langskip) were long clinker-built warships (Old Norse: herskip, Old Swedish: hærskip) propelled by oars, and later also by sail, used by the Norse and surrounding Germanic tribes from at least the 4th century AD and throughout the Viking Age, being part of the Nordic ship building tradition. As the name suggests, they were long slender ships, intended for speed, with the ability to carry a large crew of warriors. They are sometimes called "dragonships" (Old Norse: drekaskip) due to a tradition of the fore and aft ends being decorated with a raised dragonhead (Old Norse: drekahofud) and tail respectively, with the sail making up the "wing" of the dragon. The largest types were thus called "dragons" (dreki), while smaller types had names such as karve (karfi), snekke (snekkja), and skeid (skeið).

Archaeological finds have been made of longships from the 9th, 10th and 11th centuries in Denmark, Norway and Germany, with motifs on Gotlandic picture stones dating to the 8th century or earlier. It is thought that the Norse specifically invented the design for Viking usage, which included raiding and warfare, exploration and commerce. The longship is a rather distinctly Norse (Scandinavian) construction, with bronze age petroglyphs in Sweden indicating a long tradition of building long animal-headed naval ships in Scandinavia. Equivalent clinker-built naval ships by the Wends (a South Baltic Slavic people) were much smaller and shorter in comparison.