island in the Adriatic Sea forming the northernmost part of Dalmatia in Croatia. It reaches a maximum altitude of 1,339 ft (408 m) at Mt. Kamenjak and comprises three ridges of limestone. Over 300 freshwater springs provide a valuable water supply to the population of the island-which, in contrast to most of the Adriatic islands, is increasing, in part because of good communications with the mainland. After its initial settlement as the colony of Arba by prehistoric Illyrians, Rab successively came under Greek, Roman, Croatian, Venetian, Austrian, French, Italian, Yugoslavian, and again Croatian rule, reflecting the historic fluctuations of power in the Adriatic
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