The Duchy of Reggio was one of the states that belonged to the Duchy of Modena and Reggio, ruled by the house of Este, in the north of Italy, in a territory now belonging to the Province of Reggio Emilia. The Duchy of Modena (in full the Duchies of Modena and Reggio) was a small Italian state that existed from 1452 to "Este" redirects here For the city see Este Italy. For Tolkien's fictional character see Estë. The Province of Reggio Emilia (Provincia di Reggio Emilia is one of the eight provinces of the Italian Region of Emilia-Romagna. The capital was Reggio. For the city in the southern Italy See Reggio Calabria. For the basketball club "Bipop Carire Reggio Emilia" see Pallacanestro Reggiana.
The perimeter of the duchy was from the Apennines to the river Po. The Po ( Latin: Padus, Po Ligurian: Bo, Greek: Eridanus) is a river that flows 652 km(405 miles (682 km by considering The ancient borders were with Guastalla, the County of Novellara, the Principality of Correggio, the Duchy of Modena and Garfagnana all ruled by the duke of Este. Guastalla is a town and commune in the Province of Reggio Emilia in Emilia-Romagna, Italy. Novellara is a town in the Province of Reggio Emilia, Emilia-Romagna, Italy. Correggio is a small town in the Province of Reggio Emilia, in the Emilia-Romagna region of Italy in the Po valley Garfagnana is an historical region of Italy, today part of the province of Lucca in the Apennines in northwest Tuscany, but before the unification of Italy Other neighbour states were the State of Lucca, the states of Tuscany, the Duchy of Parma and the State of Mantua. The Duchy of Parma was created in 1545 from that part of the Duchy of Milan south of the Po River, as a fief for Pope Paul III 's illegitimate son