The Bedford Chapel, built in 1556 and since rebuilt is described by Pevsner as the richest single storehouse of funeral monuments in any parish church in England. The Chapel is not normally open to the public except by the special consent of the Trustees of the Bedford Settled Estates. Much of the interior, however, can be seen through the windows which divide the Chapel from the Church. The stained glass is by Kempe and dates from 1895/1898. The images of St Peter and St Andrew are said to be French, that of St Andrew is late 14thcentury.

At the east end, the tomb of John Russell (1486-1555), the 1st Earl, together with his wife. He served Henry VII, Henry VIII, Edward VI and Mary. At the north side is the altar tomb of Anne, his eldest daughter, wife of the Earl of Warwick, (d. 1604) in the robes of a peeress. Also Bridget, second wife of Francis Russell, 2nd Earl of Bedford (d. 1600) and Elizabeth, wife of William, Lord Russell of Thornhaugh, father of the 4th Earl (d. 1611). A beautiful effigy, similar to that of Mary, Queen of Scots, in Westminster Abbey.

Also the simple but noble monument of black marble slabs and white columns to Lady Frances Bourchier (d. 1612), granddaughter to the 2nd Earl. Filling the west end is “the most swagger of all monuments in Buckinghamshire” (Pevsner); it is to the 5th Earl, 1st Duke (1613-1700) and is probably by Francis Bird. Nearby on the south wall is the monument to the 2nd Duke and Duchess (1680-1711), designed by William Chambers and executed by Joseph Wilton. It is in English tradition but much influenced by Rome where Wilton spent eight years.

At the south side is the altar tomb of the 4th Earl and his wife (1593-1641) and a Chrisom child (the child dying within a month of baptism and being buried in a chrisom or baptismal cloth). The 4th Earl was the head of those who undertook the draining of the great level of the Fens - the Bedford Level.

Also the altar tomb of Francis Russell, 2nd Earl of Bedford (1527-1585) and the tomb of Frances, Lady Chandos (d. 1623), wife of Edward the 3rd Earl. Among the later 19th century tombs are Georgiana, daughter of the 4th Duke of Cordon (d.1858), Earl Russell, the Prime Minister (d. 1878), Odo, Baron Ampthill (d.1884) and Lord Arthur Russell (d.1892).There are also effigies to Sir John Cheyne and his wife (late 14th century). His for some reason is not completed being left entirely in the rough block form.