Ulpia Traiana Sarmizegetusa

The settlement was built at a distance of 8 km from Tapae, a pass between Banat and Transylvania (today known as the Iron Gates of Transylvania). The choice was based on the military and economic advantages given by the natural barrier represented by the Retezat Mountains in the south and Poiana Ruscă Mountains in the north. The territory of the metropolis extended from Tibiscum to Micia and to the Jiu valley, the city being protected by several castra: Tibiscum, Pons Augusti, Micia and castra of Bumbești.[8]

The city at the crossroad of the imperial road from the Drobeta that linked the north of the province with Porolissum (Moigrad) and the one starting form Dierna going towards Tibiscum.[9]

Plan of the settlement

The urban centre was built during the time of the second governor of Dacia, Decimus Terentius Scaurianus, and acted as the governor's seat until it was moved to Apulum.[5] Form an inscription discovered at the beginning of the 14th century in the village of Grădişte, it is known that the new town was settled in the first years after the conquest of Dacia. The inscription reads: "On the command of the emperor Caesar Nerva Traianus Augustus, son of the divine Nerva, was settled the Dacian Colony by Decimus Terentius Scaurianus, its governor." In Rome, the settlement of the colony was marked by the minting of a coin, by order of the Senate, dedicated to emperor Trajan.

The first stage of building was the walled urban area, done by a detachment of Legio IV Flavia Felix. In the interior there were the public and administrative buildings as well as private residences organised as insulae. At the centre of it was the forum vetus. The entry was marked by a tetrapylon placed at the intersection of the two main streets with each side ornated with a fountain dedicated to the nymphs. South of the forum vetus, on the place of an old market, a new forum was built around 153 CE with a Capitolium at it's western side. Besides the temple dedicated to the Capitoline Triad, which marked the city as the religious centre of Dacia, in the beginning of the 3rd century a temple for the Palmyrene gods was dedicated. Northeast of the new forum was the building of the fiscal procurator of Dacia Apulensis.[10]

The civil settlement continued outside the walls, mainly to the North, covering over 100 hectares. The most important building was the amphitheatre, initially built of wood then from the second half of the 2nd century from stone. East of the amphitheatre was the sacred area with multiple temples and sanctuaries. South was a large area for Roman baths.[11]

During the reign of Hadrian the city was renamed Colonia Ulpia Traiana Augusta Dacica Sarmizegetusa. Between 222 and 235 the colony was called a metropolis.[12] The name was found on a stone inscription that reads "To Gaius Arrius Quadratus, son of Gaius, acting praetor of the emperor in Colonia Ulpia Traiana Augusta Dacica Sarmizegetusa."[13] Gaius Arrius Antoninus bore the title legatus pro praetore, which was the official title of the governor of some imperial provinces of the Roman Empire.

The city was the main residence of the Cominia gens in Dacia.[14]

Panoramic view of Domus Procuratoris

Today, the archeological site contains the following remains:

• Amphitheatre
• Gladiator school
• Goddess Nemesis Temple
• Liber Pater Temple
• Gods Aesculapius and Hygieia Temple
• Temple Basilica
• Temple of god Mithra
• Temple of palmyrans
• Great Temple
• God Silvanus Temple
• Glass blowers' workshops
• Horreum
• Financial procurator's office
• Thermae
• Forum

• 
  Votive plaque showing Silvanus
• 
  Inscription on the Forum Column
• 
  The Great Temple
• 
  The Amphitheatre
• 
  Column ornament
• 
  Temple of Nemesis
• 
  Curia
• 
  Glass workshop
• 
  Roman tablet built into the medieval Orthodox church in Sânpetru.
• 
  Aerial view
• 
  The frontispiece of the forum:
  In honorem domus divinae L(ucius) Ophonius Pap(iria) Domitius Priscus IIvir col(oniae) Dacic(ae) pecunia sua fecit l(ocus) d(atus) d(ecreto) d(ecurionum)
• 
  Aplique with the shape of Gorgona Medusa discovered at the site

• List of castra

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• (in English) ULPIA TRAIANA SARMIZEGETUSA
• (in Romanian) ULPIA TRAIANA SARMIZEGETUSA

45°31′N 22°47′E