What led to the revival of Italian cities?

1.	What led to the revival of Italian cities?
Answer» 1) western europe was reshaped by fueded bonds and unified under latin church.2) eastern europe was under byzantine empire3) islam was creating a common civilization further west.4) italy became weak and fragmented.5)mongol opened up the trade with china via Silk route as a result Italian coast revived in 12th century.

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