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In page Padua:

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After enduring a 12-year-long bloody siege, the Lombards stormed and burned the city. Many ancient artifacts and buildings were seriously damaged. The remains of an amphitheater (the Arena) and some bridge foundations are all that remain of Roman Padua today. The townspeople fled to the hills and later returned to eke out a living among the ruins; the ruling class abandoned the city for the Venetian Lagoon, according to a chronicle.[citation needed] The city did not easily recover from this blow, and Padua was still weak when the Franks succeeded the Lombards as masters of northern Italy.