Popović Marko. The Fortress of Belgrade

Institute for the Protection of Cultural Monuments of the Republic of Serbia, 1991. — 92 p. — (Monographs 36).The Belgrade Fortress consists of the old citadel (Upper and Lower Town) and Kalemegdan Park (Large and Little Kalemegdan) on the confluence of the Sava and Danube rivers, in an urban area of modern Belgrade, Serbia. Located in Belgrade's municipality of Stari Grad, the fortress constitutes the specific historical core of the city.