History of the Republic of Venice a powerful fleet sailed from Venice, to resolve the problem of the Narentine pirates. The fleet visited all the main Istrian and Dalmatian cities, whose citizen, exhausted by the wars between the Croatian king Svetislav and his brother Cresimir, swore an oath of fidelity to Venice. the Main Narentine harbours (Lagosta, Lissa and Curzola) tried to resist, but they were conquered and destroyed (see: battle of Lastovo). The Narentine pirates were suppressed permanently and disappeared. Dalmatia formally remained under Byzantine rule, but Orseolo became "Dux Dalmatie" (Duke of Dalmatia"), establishing the prominence of Venice over the Adriatic Sea. The "Marriage
Baltic Sea Gulf of Bothnia, of which the northernmost part is the Bay of Bothnia or Bothnian Bay. The more rounded southern basin of the gulf is called Bothnian Sea and immediately to the south of it lies the Sea of Åland. The Gulf of Finland connects the Baltic Sea with Saint Petersburg. The Gulf of Riga lies between the Latvian capital city of Riga and the Estonian island of Saaremaa. The Northern Baltic Sea lies between the Stockholm area, southwestern Finland and Estonia. The Western and Eastern Gotland Basins form the major parts of the Central Baltic Sea or Baltic proper.