Question: In what year did the man who founded Newark Castle, Nottinghamshire, die?

Context articles: List of new churches by Anthony Salvin
Newark and Sherwood
Newark-on-Trent
Newark Castle railway station
Newark Castle, Nottinghamshire
St Monans
List of miscellaneous works by Anthony Salvin
Newark Castle, Port Glasgow
Alexander of Lincoln
Newark Castle, Fife

Anthony Salvin (1799–1881) was an English architect, born in Sunderland Bridge, County Durham.
 He trained under John Paterson of Edinburgh, and moved to London in 1821.
 His works include new churches, restoration of and additions to existing churches, and various other buildings, including schools.
 However, he is mainly noted for his work on existing major buildings, including castles, and for designing new substantial country houses.
 The castles on which he worked include Windsor Castle, Norwich Castle, Rockingham Castle, Newark Castle, Warkworth Castle, Muncaster Castle, and Warwick Castle.
 He also carried out work on the Tower of London, and on Trinity College, Cambridge, Gonville and Caius College, Cambridge, and University College, Durham.
 His new country houses include Mamhead House (his first major project), Scotney Castle, Keele Hall, Thoresby Hall, and Peckforton Castle.
 In addition he designed the Observatory for Durham University.
Newark and Sherwood is a local government district and is the largest district in Nottinghamshire, England.
 The district is predominantly rural, with some large forestry plantations, the ancient Sherwood Forest and the towns of Newark-on-Trent, Southwell and Ollerton.
 Many settlements in the west of the district, such as Ollerton are former coal mining villages.
 Southwell is a small Georgian town with a Minster.
 The south-eastern settlements are home to many people who commute into Nottingham for work.
 Newark-on-Trent, together with Balderton, forms the largest urban concentration.
 Newark-on-Trent has many important historic features including Newark Castle, Georgian architecture and a defensive earthwork from the British Civil Wars.
Newark-on-Trent or Newark is a market town in Nottinghamshire in the East Midlands of England.
 It stands on the River Trent, the A1 (on the route of the ancient Great North Road), and the East Coast Main Line railway.
 The origins of the town are possibly Roman as it lies on an important Roman road, the Fosse Way.
 The town grew around Newark Castle, now ruined, and a large marketplace, now lined with historic buildings, and was a centre for the wool and cloth trade.
 In the English Civil War, it was besieged by Parliamentary forces and had to be relieved by Prince Rupert in a battle known as the Relief of Newark.
Newark Castle railway station is a Grade II listed railway station which serves the town of Newark in Nottinghamshire, England.
Newark Castle, in Newark, 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.
 Dismantled in the 17th century after the English Civil War, the castle was 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.
 The Gilstrap Heritage Centre is a free-admission museum in the castle grounds about the history of the town of Newark.
St Monans (often spelt St Monance) ( ; locally ) is a village and parish in the East Neuk of Fife and is named after the legendary Saint Monan.
 Situated approximately 3 miles west of Anstruther, this small community, whose inhabitants formerly made their living mainly from fishing, is now a tourist destination situated on the Fife Coastal Path.
 The former burgh rests on a hill overlooking the Firth of Forth, with views to North Berwick, the Bass Rock and the Isle of May.
 St Monans contains many historical buildings, including the now defunct windmill (which can be visited) that once powered a salt panning industry, and a 14th-century church that sits on the rocks above the water on the western side.
 Approximately ½ mile west of St Monans are the remains of Newark Castle, a 16th-century manor that has since fallen to ruin through cliff erosion and disrepair.
 In 2002, with the permission of Historic Scotland, an unsuccessful attempt to restore the castle was made.
Anthony Salvin (1799–1881) was an English architect, born in Sunderland Bridge, County Durham.
 He trained under John Paterson of Edinburgh, and moved to London in 1821.
 His works include new churches, restoration of and additions to existing churches, and various other buildings, including schools.
 However, he is mainly noted for his work on existing major buildings, including castles, and for designing new substantial country houses.
 The castles on which he worked include Windsor Castle, Norwich Castle, Rockingham Castle, Newark Castle, Warkworth Castle, Muncaster Castle, and Warwick Castle.
 He also carried out work on the Tower of London, and on Trinity College, Cambridge, Gonville and Caius College, Cambridge, and University College, Durham.
 His new country houses include Mamhead House (his first major project), Scotney Castle, Keele Hall, Thoresby Hall, and Peckforton Castle.
 In addition he designed the Observatory for Durham University.
Newark Castle is a well-preserved castle sited on the south shore of the estuary of the River Clyde in Port Glasgow, Inverclyde, Scotland, where the firth gradually narrows from the Firth of Clyde and navigation upriver is made difficult by shifting sandbanks.
 For centuries this location was used to offload seagoing ships, and led to the growth of Port Glasgow close to the castle on either side and to the south.
 When dredging techniques made the Clyde navigable as far as Glasgow the port became a shipbuilding centre, and the castle was surrounded by shipyards.
 Ferguson Shipbuilders, the last shipyard on the lower Clyde, stands close to the west of the castle, but the shipyards to the east were removed around the 1980s and new landscaped areas formed to the east of Newark Castle, opening up scenic views of the castle and across the Clyde from a new bypass road.
Alexander of Lincoln (died February 1148) was a medieval English Bishop of Lincoln, a member of an important administrative and ecclesiastical family.
 He was the nephew of Roger of Salisbury, a Bishop of Salisbury and Chancellor of England under King Henry I, and he was also related to Nigel, Bishop of Ely.
 Educated at Laon, Alexander served in his uncle's diocese as an archdeacon in the early 1120s.
 Unlike his relatives, he held no office in the government before his appointment as Bishop of Lincoln in 1123.
 Alexander became a frequent visitor to King Henry's court after his elevation to the episcopate, often witnessing royal documents, and he served as a royal justice in Lincolnshire.
Newark Castle is a ruin located just outside the town of St Monans, on the east coast of Fife, Scotland.
 Building on the site probably dates back to the 13th century at which time the Scottish king Alexander III (1241 - 1286) spent some of his childhood there.
 Since that time, the site has passed through several rebuilding phases, and it is most likely that the ruins currently visible are the remains of buildings constructed under the ownership of David Leslie in the 17th century and the Sandilands family who owned the castle since the 15th century when they gained the estate through marriage.
 Leslie was a prominent figure in the English and Scottish Civil Wars, becoming Lord Newark after the wars.