It is 8 km away from the modern city of Zalău, in Moigrad-Porolissum village, Mirsid Commune, Sălaj County.

[5] In 106, at the beginning of his second war against the Dacians, Emperor Trajan established a military stronghold at the site to defend the main passageway through the Carpathian Mountains.

Under emperor Septimius Severus, the city was granted municipium status, allowing its leaders and merchants to act independently.

[10] There are also some inscriptions mentioning city officials with Romano-Dacian names, indicating close cooperation on a political level.

[11] From 2006 until 2011, another project, "Necropolis Porolissensis", was running focused on the cemetery of the municipium Porolissum, on the spot known as "Ursoies".

In 2015, archaeologists from Zalău County Museum unearthed a stone sarcophagus containing skeletal remains of a young person.

The limestone lid has carvings that were common in Roman times, and it has a hole that suggests that the grave was robbed in antiquity.

[12] The first fort on Pomet hill is one of the largest camps (226 x 294 m) in Dacia first built with earth ramparts and rebuilt in stone during Hadrian-Antoninus Pius period.

[16] According to other studies the modifications from after 271 CE, such as walling of the space between columns in the interior of the forum and the addition of three water basins constructed with crude masonry, show that a thriving community continued to inhabit the site.