History of Portsmouth, NH

Portsmouth shipbuilding history has had a long symbiotic relationship with Kittery, Maine, across the Piscataqua River. In 1781-1782, the naval hero John Paul Jones lived in Portsmouth while supervising construction of his ship Ranger, which was built on nearby Badger's Island in Kittery. During that time, he boarded at the Captain Gregory Purcell house, which now bears Jones' name, as it is the only surviving property in the United States associated with him. Built by the master housewright Hopestill Cheswell, an African American, it has been designated as a National Historic Landmark. It now serves as the Portsmouth Historical Society Museum.

The Portsmouth Naval Shipyard, established in 1800 as the first federal navy yard, is located on Seavey's Island in Kittery. The base is famous for being the site of the 1905 signing of the Treaty of Portsmouth which ended the Russo-Japanese War