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In page Bayonne:

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The site on the left bank of the Nive and the Adour was probably occupied before ancient times; a fortified enclosure was attested to in the 1st century at the time when the Tarbelli occupied the territory.[citation needed] Archaeological studies have confirmed the presence of a Roman castrum, a stronghold in Novempopulania at the end of the 4th century, before the city was populated by the Vascones.[citation needed]