Newark Castle, in Newark-on-Trent in the English county of Nottinghamshire, was founded in the mid 12th century by Alexander, Bishop of Lincoln. Originally a timber castle, it was rebuilt in stone towards the end of the century. The castle was slighted (dismantled) in the 17th century as a result of the English Civil War, and restored in the 19th century, first by Anthony Salvin in the 1840s and then by the corporation of Newark who bought the site in 1889.