Framlingham Castle developed as the principal Suffolk stronghold of the Bigod family, Norman lords who became earls of Norfolk. An earlier castle existed by the twelfth century, but Henry II destroyed or dismantled it after Hugh Bigod joined the rebellion of 1173–74. Roger Bigod, the next earl, then created the remarkable stone enclosure that survives. Instead of relying on a central keep, the new design used a high curtain wall strengthened by thirteen towers, enclosing domestic buildings and giving the entire perimeter both defensive and ceremonial force.

The Bigods repeatedly challenged royal authority. During the civil war at the end of King John’s reign, royal forces besieged Framlingham in 1216, and the garrison surrendered after a short resistance. The castle was returned and further developed, with halls, chambers, chapels, service buildings, and extensive hunting lands supporting an aristocratic household. Roger Bigod, fifth earl, became a prominent opponent of Edward I over taxation and military service. When he died without a direct heir in 1306, Framlingham passed to the Crown.

Later owners included the Brotherton, Mowbray, and Howard families, each connected to national politics. John Howard received the title duke of Norfolk from Richard III and used Framlingham as a major residence. The Tudor monarchy confiscated and restored the property more than once as noble fortunes shifted. In July 1553, Mary Tudor came to Framlingham after supporters of Lady Jane Grey attempted to exclude her from the throne. Protected by the castle and gathering a growing army, Mary was proclaimed queen and departed for London in triumph.

The military and residential importance of Framlingham declined under later Howards. In 1635–36 Theophilus Howard arranged for the estate to pass to Pembroke College, Cambridge, with charitable obligations. Buildings within the walls were removed or adapted, and a poorhouse opened in the eighteenth century. The site later served workhouse, relief, educational, and drill-hall functions. These changes erased much of the medieval interior but kept the enclosure connected to community life rather than leaving it wholly abandoned.

Framlingham entered public guardianship in the twentieth century and is now cared for by English Heritage. Conservation protects the wall walk, towers, earthworks, and surviving Tudor chimneys, while archaeology reconstructs lost buildings within the courtyard. The castle’s open interior can therefore be misleading: it once contained a dense complex supporting noble and royal households. Framlingham’s history joins architectural innovation with rebellion, aristocratic power, Mary Tudor’s successful bid for the crown, and centuries of charitable reuse. Its walls survived because later generations repeatedly found new purposes for the enclosed space.