| In his campaign to subdue northwestern Wales, Edward I
had several castles built, with the one in Caernarfon the most remarkable one of them all. As the picture at left shows, the walls are massive, even by
the standards set for castles in Wales. The port that the castle guarded allowed Edward easy communications over the sea, and it is noteworthy that Caernarfon is located near the site of a camp built by
the Romans, who also relied on seapower for their control of the region.
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