Caistor is a town and civil parish in the West Lindsey district of Lincolnshire, England. As its name implies, it was originally a Roman castrum or fortress. It lies at the north-west edge of the Lincolnshire Wolds, on the Viking Way, and just off the A46 between Lincoln and Grimsby, at the A46, A1084, A1173 and B1225 junction. It has a population of 2,601. Its name comes from the Anglo-Saxon ceaster ("Roman camp" or "town") and was given in the Domesday Book as Castre. Buildings Only a few fragments of the 4th-century walls remain; for example, the original Roman wall is visible on the southern boundary of the parish church of St Peter and St Paul. The area occupied by the fortress is now classified as a Scheduled Ancient Monument. The church of St Peter and St Paul, which is enclosed within the fortress, has an Anglo-Saxon tower. The market square lies at the heart of a conservation area which contains 56, mainly Grade II, listed buildings. In numerical terms, the number of listed buildings makes Caistor the most important conservation area in the West Lindsey area; many of the buildings are Georgian or Victorian. Notable buildings in the town include Caistor Grammar School, founded in 1633, and Sessions House, built in 1662. In 2010 the remains of a 4th-century Roman cemetery were found during the development of a new Co-op supermarket. Education Grammar school Caistor Grammar School dates from the reign of Charles I. An academy with a selective pupil intake, it has specialist school status for sports and humanities. Sir Henry Newbolt, author of Drake's Drum, was educated at the school. Caistor Yarborough Academy School Caistor Yarborough Academy is a mixed comprehensive school named in memory of John Edward Pelham, the 7th Earl of Yarborough. Being limited to 570 pupils it is much smaller than the average British school of this type. It has Arts College status under the English specialist schools programme. In 2012 the school became an Academy. RAF Caistor Opened in 1940, RAF Caistor was built as a relief airfield for RAF Kirton in Lindsey, and also used for flying training from its grass runways. Closed in 1945, it later reopened as a nuclear missile base. Between 1959 and 1963 Caistor was manned by 269(SM) Sqn. equipped with three Thor missiles. The site has now returned to agricultural use, and little remains of the military