Roman Amphithreatre Base of King Arthur's Round Table Legend?

The team wondered whether the legendary round table was actually based on an iconic Roman building, such as, an amphitheatre.

Christopher Gidlow: It's a very intruiging hypothesis, that the round table, the item that appears in the medieval legend is actually based on a rememberence of a big iconic structure, like a Roman amphitheatre for example, that actually existed back in the time of the historical Arthur, back in the 5th or 6th centuries.