A Roman Fortress and a Norman Castle, All in One
One of the most fascinating aspects of Portchester Castle is its dual identity as both a Roman fortress and a Norman stronghold. Built by the Romans in 285-290 AD; the outer walls of this ancient Roman fort still stand, making Portchester Castle the best-preserved Roman fort north of the Alps. Centuries later, after the Norman Conquest, the castle was transformed, integrating the Roman walls into a medieval stronghold. You'll literally walk through layers of history as you explore the grounds!