Dagobert
 von Wurmser proved unable to defend this city from the forces of Napoleon Bonaparte in a 1796 to 1797
 siege that led to the Treaty of Campo Formio.
This city joined Peschiera, Verona, and Legnago in a group of symbiotic Austrian fortresses known as
 the "Quadrilateral." After the death of Matilda of Canossa, this city was led by the Bonacolsi family. One
 ruler of this city was Francesco II, who cheated on his wife Isabella d'Este with Lucrezia Borgia. Dagobert
 von Wurmser proved unable to defend this city from the forces of Napoleon Bonaparte in a 1796 to 1797
 siege that led to the Treaty of Campo Formio. The Treaty of Cherasco ended a 1628 to 1631 war between
 France and the Holy Roman Emperor over control of this city after the death of its ruling Gonzaga line. For
 10 points, name this Lombard city.
This city joined Peschiera, Verona, and Legnago in a group of symbiotic Austrian fortresses known as
 the "Quadrilateral."
{Mantua}