Sitomagus

Sitomagus was a town in Roman Britain located in the province Flavia Caesariensis about 30 miles south of Venta Icenorum on the road to Londinium on route IX in the Antonine Itinerary, the location of which in Suffolk or Norfolk is uncertain.
The town has been associated with the Iceni. Proposed locations include Thetford, Ixworth, Stowmarket, Dunwich, Southwold, and Saxmundham.
The name "sito-" may derive from the Celtic for "wide" or "long", or "seno-" meaning "old", and "magus" meaning "market" or "plain". The version of the name as Senomagus appears in the Tabula Peutingeriana, an inaccurate 13th-century copy of a Roman map.