A monument of Constantine the Great was erected in the southern Serbian city of Nis, part of the project “The Emperors of Carnuntum - They Changed the World” by Piero Bordin, Founder and Artistic Director of the Art Carnuntum foundation, the Nis City Assembly said in release Monday.

The monument, presenting the head of Constantine the Great and his monogram, was unveiled by delegations from Austria and Turkey, together with Nis Mayor Milos Simonovic, during yesterday's celebration of the City of Nis patron saint's day and Day of Constantine the Great and Empress Helena.

Art Carnuntum has declared Serbia and Nis to be great places of world history, with Constantine the Great linking together three cities from three different regions - Austria's Carnuntum, Nis and Turkey's Izmit.

1,700 years ago, on November 11, 308, a conference took place in Carnuntum establishing Tetrarchy (Rule of Four), redistributing the power over the Roman Empire to four rulers, namely, to Galerius as Augustus and Maximinus as Ceasar in the East and to Licinius as Augustus and Constantine, who was born in Nis, as Ceasar in the West.

In the name of the Four Tetrarchs appointed in Carnuntum, Galerius issued the Nicomedia Edict of Tolerance (today the City of Izmit) on April 30, 311. It was extended by Constantine the Great and Licinius through the “Edict of Milan” in 313, granting religious liberty to all creeds.

The Tetrarchs present a key link for the cities participating in the project, also including York, Trier, Arles, Belgrade, Istanbul, Thessaloniki, Rome and Milan.

The monument was made after a joint solution of the project's authors by sculptor Mile Kocev, while its unveiling is part of the city of Nis preparation for marking 17 centuries since the signing of the Edict of Milan.