Newark-upon-Trent, a town of Notts, on a navigable branch of the Trent, 18 miles by rail NE. of Nottingham, and 120 N. by W. of London. It is approached from the north by a causeway, 1 1/2 mile long, constructed by Smeaton in 1770, and carried over the flat island formed by the Trent on the west and the Newark branch on the east. The fine parish church, built mainly between 1350 and 1489, has an octagonal spire 223 feet high. Other edifices are the town-hall (1805), corn exchange (1848), hospital (1881), coffee-palace (1882), free library (1882), and grammar-school, founded by Archdeacon Magnus in 1529. Newark has a very important corn-market and great malting industries, besides iron and brass foundries, manufactures of boilers and agricultural implements, and plaster of Paris works. Incorporated by Edward VI., it returned two members to parliament till 1885. Pop. (1851) 11,230 ; (1901) 14,992. A British town and Roman station, Newark in Saxon times became the seat of a castle, which was rebuilt in 1125 by Alexander, Bishop of Lincoln (hence the name New Wark), and was long known as the 'key of the north.' King John died in it (1216); and in the Great Rebellion it stood three sieges, in the second of which it was relieved by Prince Rupert (1644), whilst in the third it was surrendered to the Scots by order of Charles I., who had just delivered himself up (5th May 1646). It was then dismantled, and is now represented only by a very picturesque ruin in a public garden. See works by Shilton (1820) and Cornelius Brown (1879).