added by archaeologs The site of a Roman port in Kent, England, just north of Sandwich. After the Roman invasion of Britain in 43 AD, Richborough / Rutupiae was established to guard the Wantsum Channel separating the island of Thanet from the rest of Kent. Extant remains of Richborough Castle include the north wall of a Saxon Shore fort, possibly built in the 3rd century. The fort was equipped with a military bath-suite, of which the hypocaust survives, and an external amphitheater. Closeby is the site of the landing of the Saxon leaders Hengist and Horsa in 449 AD. It is also starting-point for the Roman road, Watling Street, to Chester via London. The site is now 5 km inland and no longer on the coast, following silting of the Wantsum Channel.