in the 290s, including a coin from the reign of Allectus, four decades earlier than the previously accepted date range for the fort's construction. In 2019 a geophysical survey of the outer bailey was carried out. See also Castles in Great Britain and Ireland List of castles in England Notes References Bibliography Further reading External links Official page: English Heritage Roman-Britain.co.uk Battles involving the Normans Castles in East Sussex English Heritage sites in East Sussex Norman conquest of England Ruins in East Sussex Roman auxiliary forts in England Castle