The Late Roman fortified palace compound and memorial complex of Gamzigrad-Romuliana, Palace of Galerius, in the east of Serbia, was commissioned by Emperor Caius Valerius Galerius Maximianus, in the late 3rd and early 4th century. It was known as Felix Romuliana, named after the Emperor"s mother. The site consists of fortifications, the palace in the north-western part of the complex, basilicas, temples, hot baths, memorial complex, and a tetrapylon. The site offers a unique testimony of the Roman building tradition marked by the ideology of the period of the Second Tetrachy. The group of buildings is also unique in its intertwining of ceremonial and memorial functions. The relation between two spatial ensembles in this site is stressed by the tetrapylon which is placed on the crossroads between the worldly fortification and palace on the one side and the other-worldly mausoleums and consecration monuments on the other.