The castle was built by
Geoffrey Fitz Peter, 1st Earl of Essex, in the late 12th century. The inner court was rebuilt by
Anne, Duchess of Buckingham, in the late 15th century. The
fenland climate damaged her health, and she died in the castle on 7 January 1536. The castle was bought by Sir
John Popham in 1600 and was later purchased by
Sir Henry Montagu, later created 1st Earl of Manchester, in 1615. During 1690 and 1695 the castle courtyard was remodelled and attributed on stylistic grounds to Henry Bell (1647-1711) who refronted the Tudor courtyard, introduced galleries and the main staircase.
George Montagu, 4th Duke of Manchester commissioned
Robert Adam to design the gatehouse which was constructed in 1766.
Alexander Montagu, 10th Duke of Manchester sold the contents in 1949, and the castle and were sold to
Kimbolton School in 1951. ==Warren House==