Duchy of Modena and Reggio
The Congress of Vienna combined these lands into a single kingdom, ruled in personal union by the Habsburg Emperor of Austria; as distinct of the neighbouring Grand Duchy of Tuscany, the Duchy of Modena and Reggio as well as the Duchy of Parma, which remained independent entities under Habsburg rule. The Austrian emperor was represented day-to-day by viceroys appointed by the Imperial Court in Vienna and resident in Milan and Venice.