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
Castlefield Park in 1982. The name Castlefield refers to the settlement's position below the former Roman fort. It is a contracted version of the earlier name Castle-in-the-field. Another name for the area was Campfield, which derived from the same source. It is preserved in the name of St Matthew's Church, Campfield, and Campfield Market. (Manchester also derived its name from the fort.) An older name for the settlement was the Old English Aldport, meaning old or long used port, distinguishing it from the new port at medieval Manchester nearer the confluence of the Rivers Irk and Irwell. "Port" in Old English