Estação arqueológica de Alter do Chão

Estação arqueológica de Alter do Chão is an archaeological site in the town of Alter do Chão in Portugal's Alentejo, listed as a cultural heritage monument. What has been found here is tied to the Roman town of Abelterium, offering a rare look at everyday life in the province of Lusitania.

What is this place?

The site lies in an area called Ferragial d'El-Rei, next to the municipal football pitch. It was the construction of that pitch in 1954 that exposed part of a bath complex, now regarded as the remains of the public baths of the Roman town of Abelterium. The discovery was accidental, but it began a long history of research into the ancient settlement.

Why does Abelterium matter?

The name Abelterium appears in the Antonine Itinerary, a Roman list of roads and settlements. For a long time scholars had to rely on indirect arguments to link it with present-day Alter do Chão. A breakthrough came in the summer of 2009, when workers clearing collapsed roofing from a corridor behind the triclinium of the so-called Casa da Medusa found a Roman roof tile (imbrex) bearing a graffito. The inscription identifies the place as Abelterium and is considered strong evidence.

The Casa da Medusa and the baths

Two main elements stand out on the site: a Roman villa known as the Casa da Medusa, and a complex of public baths. The villa had a triclinium, a formal dining room, and part of its roof survived as rubble, which led to the discovery above. The baths were a hub of daily life: a place for bathing, meeting and relaxing. According to one study, the site received official recognition on 9 January 1954.

Research and publications

The municipality of Alter do Chão publishes a journal called "Abelterium" with studies on the site. Volume I, from 2014, includes an article by Maria Pilar Reis on the baths of Abelterium, summarising what is known about them. Around 2004 a project was also under way to recover and develop the site for visitors.

Who should visit?

The place suits anyone interested in ancient history, archaeology and the Roman heritage of the Iberian Peninsula. It makes a good stop on a trip through the Alentejo, especially if you want to combine a visit to a small town with a look at its ancient roots. The site is modest in size, so a visit does not take long, and the centre of Alter do Chão has further monuments nearby.

Frequently asked questions

Where is the site? In Alter do Chão, in the Ferragial d'El-Rei area, beside the municipal football pitch.

What was the Roman town called? Abelterium, as confirmed by the graffito on a roof tile found in 2009.

When were the baths discovered? In 1954, during construction of the municipal football pitch.

Are there current opening hours? Check with the Alter do Chão municipality before visiting, as access arrangements may change.

What is the Casa da Medusa? A Roman villa within the site, where the tile with the identifying inscription was found.