Serbia, country in the west-central Balkans. For most of the 20th century, it was a part of Yugoslavia.

The capital of Serbia is Belgrade (Beograd), a cosmopolitan city at the confluence of the Danube and Sava rivers; Stari Grad, Belgrade’s old town, is dominated by an ancient fortress called the Kalemegdan and includes well-preserved examples of medieval architecture and some of eastern Europe’s most-renowned restaurants. Serbia’s second city, Novi Sad, lies upstream on the Danube; a cultural and educational centre, it resembles the university towns of nearby Hungary in many respects.