Castrum Gariannonum
Norfolk, United Kingdom
Caister Roman Site is a Roman Saxon Shore fort, located in Caister-on-Sea, Norfolk, England. It was constructed around AD 200 for use by units of the Roman army and navy, and was occupied until around 370-390 AD. This fort was possibly known as Gariannonum, although the single record that describes it as such may also mean the Roman site at Burgh Castle.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).