A reconstruction of the Richborough triumphal arch as it may have looked from the waterfront in about AD 120. © Historic England (illustration by Peter Lorimer)         Bachground: Richborough (Rutupiae) was an important  port city for the Roman conquest and control of Britain. It is the start of the Roman Watling street. Because of changing coastlines, the site is now more than two miles inland from the coast. Richborough is Britain’s only known site of