Longships were sea vessels made and used by the Vikings from the Nordic countries for trade, commerce, exploration, and warfare during the Viking Age although scientific analysis of the oak timber shows at least one well known ship was built in Dublin, Ireland. The longship’s design evolved over many years, beginning in the Stone Age with the invention of the umiak and continuing up to the 9th century with the Nydam and Kvalsund ships. The longship appeared in its complete form between the 9th and 13th centuries. The character and appearance of these ships have been reflected in Scandinavian boat-building traditions until today. The particular skills and methods employed in making longships are still used world wide, often with modern adaptations. They were all made out of wood, with cloth flags and had lots of details and carvings on the hull.