Belgrade Fortress (Kalemegdan) is the core and the oldest section of the urban area of Belgrade. First mention of the city is when it was founded in the 3rd century BC as "Singidunum" by the Celtic tribe of Scordisci.
The Belgrade Fortress was constructed as a defensive structure on a edge overlooking the convergence of the Sava and the Danube rivers. It was built during the period from the 2nd to the 18th century. Nowadays the fortress is a unique......[link]