Felix-Romuliana at Gamzirad Panorama Located near Zaječar the complex was built by Emperor Galerius in 298 AD to mark his birthplace. The site was named after his mother, Romula, who was a priestess of a pagan cult. As one of the Tetrarchs, Galerius ruled the empire jointly with three others as either Caesars (junior emperor) or Augusti (senior emperor).