Dubrovnik is a city in Croatia on the Dalmatian coast. More than 500 years ago it was called "Ragusa". The Italian name of the city is still "Ragusa"; this sometimes leads to confusion because there is already a city named Ragusa on Sicily. It is on the Adriatic Sea. About 50,000 people lived there in 2001. Because of its age and unique buildings, the old city of Dubrovnik has been declared a UNESCO World Heritage Site.