Roman thermae of Valduno

The Roman thermae of Valduno, in the municipality of Las Regueras in central Asturias, are the remains of a Roman bathing complex uncovered right next to the parish church of Santa Eulalia de Valduno. The site is regarded as one of the best-preserved examples of Roman thermal architecture in Asturias and is listed in the region's Inventory of Cultural Heritage.

Where is Valduno and how do you get there?

Las Regueras is a municipality in central Asturias, bordering Oviedo, the regional capital, to the east. The village of Valduno itself sits in the valley of the river Nalón, and the bath ruins lie directly beside the church of Santa Eulalia de Valduno. The area is crossed by the historic Camino Real de la Mesa, an ancient route linking the interior of the Castilian plateau with the Asturian coast that was already in use in Roman times.

How were the Roman baths discovered?

A Roman presence in Valduno had long been suspected: pottery fragments, coins and the remains of a water mill turned up here during the 19th and 20th centuries. In 1947, the Asturian archaeologist José Manuel González noted a stone slab bearing a Latin inscription near the church. The real breakthrough came in 2004, during roadworks carried out on the way to the local cemetery, when excavations uncovered the caldarium — the hot-water room at the heart of any Roman bathhouse.

What can visitors see on site?

The excavated remains clearly show two of the complex's key rooms: the tepidarium, a moderately heated room, and the caldarium, heated by a hypocaust system typical of Roman construction. The layout points to an axial plan in which the caldarium, tepidarium and frigidarium (the cold-water room) were aligned in sequence and linked by a lateral corridor — a design known from other provincial Roman baths. The full complex may have covered more than 200 square metres, yet less than 50 square metres have been excavated so far, meaning much of the site still lies underground.

How old are the thermae?

Construction is dated to the late 1st or early 2nd century AD. Researchers believe the complex remained in use for several centuries, possibly into late antiquity around the 5th century AD. This long chronology makes Valduno an important reference point for studying the Roman presence in northwestern Spain, a region that, unlike the more thoroughly Romanized interior of the Iberian Peninsula, kept strong pre-Roman local traditions well into late antiquity.

Why do the thermae matter for regional heritage?

By decree of 23 December 2013, Asturian authorities listed the site known as "the church and Roman villa of Valduno" in the region's Inventory of Cultural Heritage, confirming its importance to Asturian history. The Valduno thermae are a rare local record of a private Roman residence equipped with a full bathing suite, pointing to the presence of wealthy Roman elites or a strongly Romanized local population in the Nalón valley.

Frequently Asked Questions

Can visitors see the Roman thermae of Valduno? The site is an open-air archaeological excavation next to the parish church in Valduno and forms part of the Roman heritage trail of the Las Regueras municipality.

How old are the thermae of Valduno? The complex was built in the late 1st or early 2nd century AD, making it nearly two thousand years old.

What is the difference between the caldarium and the tepidarium? The caldarium was the hot-bathing room, heated from below by a hypocaust system, while the tepidarium was a moderately heated transitional room used between the cold and hot baths.

How far is Valduno from Oviedo? Las Regueras, the municipality where Valduno lies, borders Oviedo, the capital of Asturias, directly to the east, making the site an easy day trip from the city.