Architectural Features
4-stage, west tower has plinth clasping buttresses, quatrefoil fireze with gargoyles and castellated parapet with corner pinnacles
East end of south aisle has 3-light C15 window (rediscovered in C19 and serving as pattern for restoration of aisle windows) with traces of painting on left-hand jamb
South aisle west window has C19 stained glass
Font, probably medieval, on C19 base
The niches contain 4 colossal monuments, to John, Duke of Montagu, d.1752, by L.F. Reubiliac, and to Mary, Duchess of Montagu, d.1775, by Robert Adam and P.M. van Gelder (on north side), to Mary, Duichess of Montagu, d.1753, by L.F. Reubiliac and to Elizabeth, Duchess of Buccleuch, d.1827, by Thomas Campbell (on south side). Paved stone and marble floor, curved altar dais of black marble and mid-C18 communion rail with 4 scrolly iron supports. (Buildings of England: Northamptonshire: pp442-4).