Clausism
Clausentum was a Roman port city in Britain .
In the Itinerarium Antonini the place is mentioned as the starting point of the route from Noviomagus Regnorum to Londinium . The remains of the place are probably in what is now Bitterne , a suburb of Southampton , although the Roman settlement at Wickham has also been discussed as a location. In the Itinerarium Antonini (road route VII) a distance from Clausentum to Noviomagus Reginorum ( Chichester ) of 20 Roman miles is given. The distance from Chichester to the site in what is now Southampton is around 30 Roman miles (45 km). A transcription error (XX instead of XXX) or an indication in Gallic miles is therefore taken into account for the identification of the site in Bitterne with Roman Clausism.
The site in Bitterne (Southampton) is directly on the Itchen , where the river formed a loop here, and the place was thereby on a kind of peninsula. As a result, the city was well protected by water on three sides. The place was relatively small, but it was walled. Some inscriptions were found, including milestones and a dedication to an otherwise unknown goddess Ancasta . Various coin finds also bear witness to Roman settlement.
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Coordinates: 50 ° 55 '4.9 " N , 1 ° 23' 0.2" W.