Richborough Castle fighting moved north, Rutupiae became an increasingly large civilian settlement. There were temples, an amphitheatre (visible as a hummock in the grass 5 minutes walk from the main site), and a "mansio" (first built in 100, it was a building that went through several phases, being a hotel for visiting officials, bath house and administration building). As a port, the town always competed with Portus Dubris (modern Dover), about south along the coast. However, Richborough was widely regarded throughout the Roman Empire for the quality of its oysters. They are mentioned as on a par with those from the Italian
Othona as a "huge ruin". Othona Othona or Othonae was the name of an ancient Roman fort of the Saxon Shore at the location of the modern village Bradwell-on-Sea in Essex, England. The Old English name "Ythanceaster" for the locality derives from the Roman name. The fort of Othona is in a typical late 3rd century style, and was possibly constructed in during or shortly prior to the Carausian Revolt, making it contemporary with the forts at Dubris, Portus Lemanis and Gariannonum According to the "Notitia Dignitatum", which is the only contemporary document mentioning Othona, the fort was garrisoned by a