A delegation from the city of Trebinje will travel to Vienna these days to participate in the celebration of the Day of Serbian Unity, Freedom and the National Flag, an event dedicated to the Serbian diaspora and the preservation of national identity organized by the Embassy of the Republic of Serbia in Austria. In addition to its ceremonial nature, the visit to Vienna also has an important economic and promotional role – its focus is on the final phase of the project to open the Republic of Srpska House