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In page Trento:

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The origins of this city on the river-route to Bolzano and the low Alpine passes of Brenner and the Reschen Pass[1] over the Alps are disputed. Some scholars maintain it was a Rhaetian settlement: the Adige area was however influenced by neighbouring populations, including the (Adriatic) Veneti, the Etruscans and the Gauls (a Celtic population). According to other theories, the latter instead founded the city during the 4th century BC.[citation needed]