Dalmatia (; Croatian: Dalmacija [dǎlmatsija]; Italian: Dalmazia [dal'mattsja]) is a historical region located in modern-day Croatia and Montenegro, on the eastern shore of the Adriatic Sea. It is a narrow land belt stretching from the island of Rab in the north to the Bay of Kotor in the south. The Dalmatian Hinterland ranges in width from 50 kilometres in the north, to just a few kilometres in the south; it is mostly covered by the rugged Dinaric Alps. Seventy-nine islands (and about 500 islets) run parallel to the coast, the largest (in Dalmatia) being Brač, Pag, and Hvar. The largest city is Split, followed by Zadar, Šibenik, and Dubrovnik.
The name of the region stems from an Illyrian tribe called the Dalmatae, who lived in the area in classical antiquity. With the expansion of Rome, the province of Illyricum was established, and in the early 1st century it was reorganised into the province of Dalmatia, which stretched over a vast territory. Consequently, a Romance culture emerged, and the indigenous Illyrian population became romanised. Following the fall of the Western Roman Empire and the Migration Period, many different peoples passed through Dalmatia. While the local Illyro-Romans organized themselves around their city-states under Byzantine protection, the Croats arrived in the early 7th century and established the Duchy of Croatia, later becoming vassals of the Franks. With the Christianisation of the Croats, Slavic and Illyro-Roman elements began to intermingle in both language and culture. The Kingdom of Croatia was founded in 925, and it later incorporated the Theme of Dalmatia.
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