IV 118) was an ancient town in the westernmost part of Lusitania during the Iron Age and Roman Times that was mentioned by Pliny the Elder and Ptolemy.

As such, in some cases cities were created anew while in others, existing indigenous settlements were transformed to meet the requirements.

The original settlement developed into a city in Roman times, and was occupied until the Early Middle Ages.

At this time the thermal baths and paved road along the southeast were constructed, reflecting the Flavian economic prosperity.

By the end of the 4th century, there is a marked reduction in the population, although a level of continuity persisted on the site: primarily around the small Chapel of São Brás.

[2] Castelo Velho hill (245 metres) dominates the site that is one kilometre north-west from the urban centre of modern Santiago do Cacém, which overlooks the northern plain of Chãos Salgados.

[2][3] The halls are warmed by a hypocaust system that heated the floors of baths, which was located in the south part of the buildings.

It was a subterranean system formed by pillars and arches, with tile, that allowed the circulation of warm air to produce heated environments, supported by kilns.

[2] This was followed in 1996-1997 by the acquisition of the lands that surrounded the site, as part of the ZEP-Zona de Protecção Especial (Special Protection Zone) designation.