Greatest Iron Age fortifications ?

[Sean Manning]

Also, all I was trying to get across is that if you ask a question about something "Celtic" and don't define what you mean, people are going to give different answers. There are at least three definitions in common use (the language family, the Halstatt and La Tene archaeological cultures, and a proposed family of Iron Age cultures) relevant to ancient history, let alone modern definitions like "Scots, Welsh, Irish, and Brettons". So maybe Theodosius should explain what he thought he was asking about?