The Diet of Roncaglia was called after a defeat of this city, though forces from here would later win the Battle of Legnano.  
An uprising in this locale against Joseph Radetzky was known as this city's "Five Days."  The Diet of Roncaglia was called after a defeat of this city, though forces from here would later win the Battle of Legnano.  The Treaty of Campo Formio recognized it as capital of the new Cisalpine Republic under Napoleon.  Charles VIII of France was encouraged to invade Italy by a ruler of this city whose swarthy complexion resulted in him being called "Il Moro," and it was home to a coalition that fought Frederick Barbarossa, the Lombard League.  For 10 points, name this city whose Duchy was established by the Visconti family and later ruled by Sforza family.
An uprising in this locale against Joseph Radetzky was known as this city's "Five Days."  
Milan