Gamzigrad (Serbian Cyrillic: Гамзиград, pronounced [ɡǎmziɡraːd]) is an archaeological site, spa resort and UNESCO World Heritage Site of Serbia, located south of the Danube river, near the city of Zaječar. It is the location of the ancient Roman complex of palaces and temples Felix Romuliana (Serbian: Феликс Ромулијана / Feliks Romulijana), built by Emperor Galerius in Dacia Ripensis. The main area covers 10 acres (40,000 m2).