Was it the centre of the world?
There's a welsh archaeologist who's got a book coming out shortly about how much influence came from the West from Ireland, or from the South East via England via Spain, etc.
I've just got hold of an archaeological report for one of the burial chambers on Anglesey, and it lists all of them there including those that have been destroyed. And it was fairly heaving with them.
It's dotted with standing stones, a couple of Irish Stylee passage graves, and most interesting of all the two "Avebury" style stones that are supposedly the remainder of not one but two large adjacent stone circles (of interest because the Welsh don't usually go in for Big stone circles)
The island is flat and has always been used for arable, and to this day has fairer weather than the mainland.
As it's coastal it would have been possible to visit some of the coastal axe factories along north Wales.
The Druids fought their last battle against the Romans there. It was their stronghold and it was where they trained up the next generation (including Welsh leaders-to-be). So it was an important legal and cultural centre.
The Irish were sent home from there and told not to come back in the early Medieval Period. So it was fairly "cosmopolitan".
So, alright, it's not the Avebury Ritual Complex, but it's bob-on central for the British Isles (No, that's the Isle of Man).
Consider it to be like an international trade point of the British Isles, you know it makes sense.
...possibly.
