Gamzigrad-Romuliana is a fortified palace and a memorial complex of the Roman emperor from the time of the Tetrarchy, Gaius Valerius Galerius Maximianus. It was built between 297 and 311, and intended to be the residence of the emperor after the vincenalia and his withdrawal from the throne. The late Roman fortified palace of Gamzigrad - Felix Romuliana was inscribed on UNESCO World Heritage List in 2007.