Duchy of Mantua
Sabbioneta was above all the capital of a small state placed between great regional states: the Duchy of Milan to the west, ruled at that time by the Spanish governorate; the Duchy of Mantua to the east, over the River Oglio, governed by ancient line of the Gonzaga, cousins of Vespasiano; the Duchy of Parma and Piacenza to the south of Po, under the domain of Farnese family, supportive of Gonzaga himself.