Emilia-Romagna is an administrative region of Northern Italy comprising the two historic regions of Emilia and Romagna. It forms a rough triangle, bounded on the East by the Adriatic Sea, on the North by the Po river and on the South by the Apennine range; these two linear features, with the Via Aemilia, and the A1 highway and the railway that run close and parallel to it, give an unusually regular structure to the whole region except for the easternmost part. About a half of the region is constituted by Padan Plain, an extremely fertile alluvial plain crossed by the river Po. The rest of the territory is occupied by the hills and mountains of Tuscan-Emilian Apennines.The name Emilia-Romagna has roots in the Ancient Rome legacy in these lands. Emilia refers to via Aemilia, an important Roman way connecting Rome to the northern part of Italy. Romagna is a corruption of Romània; when Ravenna was the capital of the Italian portion of the Byzantine Empire, the Lombards extended the official name of the Empire to the lands around Ravenna. Emilia-Romagna was part of the Etruscan world and in following was passed on to the Gauls and then the Romans, who built it the Aemilian Way, for which the region was named. The coastal area of Emilia, which was ruled under the Byzantines from 540 to 751, became known as the separate region of Romagna. In the Middle Ages, the history of both Emilia and Romagna was the history of its individual cities. In the 16th century, most of these were included into the Papal States, but the territory of Parma, Piacenza, and Modena remained independent until Emilia-Romagna was included into the Italian kingdom in 1859-1861.
