Olbia is a city and comune of 60,345 inhabitants (May 2018) in the Italian insular province of Sassari in northeastern Sardinia (Italy), in the Gallura sub-region. Called Olbia in the Roman age, Cività in the Middle Ages (Giudicati period) and Terranova Pausania before the 1940s, Olbia was again the official name of the city during the period of Fascism. It is the economic centre of this part of the island (commercial centres, food industry) and is very close to the Costa Smeralda tourist area. It was one of the administrative capitals of the province of Olbia-Tempio, operative since 2005 and canceled after a referendum seven years later. Olbia is a tourist destination thanks to its sea and beaches and also for the large number of places of cultural interest to visit.