Caister Castle was commissioned in 1432 by Sir John Fastolf, a Norfolk-born soldier who had accumulated wealth and influence during the Hundred Years’ War. Fastolf drew on the fortified residences he had encountered in France, but the result was distinctly suited to the flat landscape near Great Yarmouth. Built mainly of locally made red brick at a time when major English buildings were still commonly constructed in stone, Caister became an early and influential example of a brick-built fortified manor house. Its moat, curtain wall, corner towers, hall, chapel, and tall residential tower combined status, comfort, and defense.

Fastolf intended Caister to be the center of his estates and a lasting monument to his family. The approximately ninety-foot tower dominated the complex and proclaimed the rank of a man who had served English kings and commanders abroad. Although the house had military features, it was not a frontier fortress. It functioned as an elite residence, estate headquarters, and visible statement of wealth. Fastolf’s household occupied it during the final decades of his life, while his connections to national politics and the French wars gave the new castle significance beyond Norfolk.

When Fastolf died in 1459, the succession to his property became bitterly contested. His lawyer and associate John Paston claimed Caister under Fastolf’s final wishes, while other executors and heirs challenged the transfer. The dispute unfolded during the Wars of the Roses, when private power and uncertain royal authority often turned legal quarrels into armed conflict. Surviving Paston family correspondence records the pressure surrounding the estate and makes Caister one of the best-documented aristocratic properties of fifteenth-century England. The letters reveal how ownership, patronage, and personal security were inseparable in the period.

In 1469, forces acting for John Mowbray, Duke of Norfolk, besieged the castle. A small Paston garrison led by John Daubeney resisted a much larger force for several weeks before surrendering after casualties and dwindling supplies. The Pastons eventually recovered Caister, but the episode fixed the castle’s place in the political history of late medieval England. It also demonstrated both the value and the limits of a fortified residence: its walls could delay an attacker, yet they could not protect an isolated household indefinitely against a magnate’s resources.

Caister remained associated with the Pastons for generations, but changing patterns of residence and maintenance gradually left much of the complex ruinous. Sections were dismantled or lost, while the great tower, portions of the curtain wall, and the moat preserved the outline of Fastolf’s ambitious design. Later antiquarian interest in the Paston Letters renewed attention to the site and its occupants. Modern conservation has stabilized the surviving brickwork, and the castle is maintained in private ownership. Its ruins now embody two linked histories: the adoption of brick in high-status English architecture and the violent competition for land and authority during the fifteenth century.