This paper model is Battlestar Galactica, a space battleship in the same named American military sci-fi television series, the papercraft was created by Steve, and the finished model by Stephen Irl. There are two size versions available, the larger version measures about 36 inches (3 feet) and the smaller about 18 inches (1-1/2 feet).
Built during the early days of the Cylon War, Battlestar Galactica (BS 75) is a veteran battlestar and was the last of her kind still in service, prior to her decommissioning by the Colonial Fleet. Officially decommissioned, Galactica was transformed into a museum ship as a memorial to the Cylon War, fought nearly forty years prior. Before decommissioning, Galactica was part of the 75th Colonial Battlestar Group. [Source: BS wiki]
You can download the papercraft model template here: Battlestar Galactica Space Battleship Free Paper Model Download