BELVOIR, a liberty (extra-parochial), partly in the soke of GRANTHAM, parts of KESTEVEN, county of LINCOLN, but chiefly in the hundred of FRAMLAND, county of LEICESTER, 7 miles (W. by S.) from Grantham, containing 88 inhabitants. Belvoir castle, the magnificent seat of the Duke of Rutland, stands on the site of an ancient fortress, said to have been built soon after the Conquest, near which a Benedictine priory was founded, in the reign of William I., the revenue of which, at the dissolution, was £135.