Cambridge

A university city in the east of England, which, according to Prior Nicholas Cantelupe (died 1441), received its charter from Arthur.

An even less likely tradition, current in Elizabethan times, was that the university ad been founded by the Spanish Prince Cantaber in Anno Mundi 3588 (since the creation of the world).

An obscure local tradition even said that Cambridge was the site of Arthur's final Battle of Camlann, though this would seem to stem from false etymology, and it could be said that any place-name having 'Cam' in it might be considered a worthy contender.