1 April 2026 The Future is the Product of the Past

The Gallo-Roman Sanctuary Unearthed in France

During a recent archaeological excavation in the old Hôtel Dieu neighborhood of Rennes in north-western France, archaeologists discovered the remains of a once bustling ancient Roman city.

The excavations under the 19th-century hospital began in 2022, according to a June 18 news release from the French National Institute for Preventive Archaeological Research. Two years later, archaeologists are revealing the city’s appearance and how Roman daily life has been preserved under the earth.

The Hôtel Dieu neighborhood has seen tremendous upheaval and development since the city’s founding. Following significant excavation and embankment work, the first roads were constructed in the first century. The neighborhood’s interior was gradually filled with structures supporting both residential and commercial activity, constructed with low foundations and wooden posts.

The use of masonry was first demonstrated at the end of the first century with the building of a sizable sanctuary with a courtyard for the reception of the faithful. This sanctuary replaced a previous wooden structure that was constructed similarly. Stone-built homes, shops, and warehouses started to spring up, and the original roads were rebuilt, completely reintegrating the neighborhood into the thriving city.

During construction for a hospital in France, the ruins of an ancient Roman city was discovered. Photo: © Cyril Cornillot, Inrap
During construction for a hospital in France, the ruins of an ancient Roman city was discovered. Photo: © Cyril Cornillot, Inrap

The sanctuary, which dates to the third century AD, was discovered during the excavation of the area sacra, the north wall surrounding its courtyard. At least one temple is located within the northern portion of this wall, which is more than 100 meters long. To the south, a portion of an east-west street is integrated into the religious complex.



📣 Our WhatsApp channel is now LIVE! Stay up-to-date with the latest news and updates, just click here to follow us on WhatsApp and never miss a thing!!



Given its size and exclusivity within Rennes, it is possible that the sanctuary was once the civic sanctuary of the Redones, a group of Gallic people whose capital was the ancient Condate, which is now Rennes. These people are only known from inscriptions that were repurposed and found buried beneath the city wall.

Masonry at the turn of the first century allowed the Roman city to flourish. Photo: © Sandrine Lalain, Inrap
Masonry at the turn of the first century allowed the Roman city to flourish. Photo: © Sandrine Lalain, Inrap

During the 3rd century, the city also had a district with large private residences, according to the release. One had a large reception room where the owner could have received clients or guests, and it even had a heated floor. An air space was placed under the floor with columns, and then warm air would be pumped into the underground space, heating the floor above, researchers said.

The end of the 3rd century brought the decline of the neighborhood. The public sanctuary was dismantled, and the stones from the enclosing wall were recovered, possibly during the construction of the castrum around 270-280. To the northwest of the excavation, a domus was completely dismantled to open a quarry for extracting alluvial sands. Despite this, some residences continued to be occupied in the 4th century, leaving their mark on the landscape through the furniture discovered.

An open area under the floor allowed hot air to be pumped in and the floor to heat in one of the large private homes, researchers said.
 Photo: © Cyril Cornillot, Inrap
An open area under the floor allowed hot air to be pumped in and the floor to heat in one of the large private homes, researchers said. Photo: © Cyril Cornillot, Inrap

A funerary space was established in the ruins at the end of the third or the start of the fourth century. It was in use until the eighth century and housed more than 600 tombs.

Google Translate was used to translate the news release from the National Institute for Preventive Archaeological Research.

INRAP

Cover Photo: Excavations at the Rennes sanctuary. © Emmanuelle Collado, Inrap

Related Articles

148 Ancient Tombs Spanning 2,100 Years Unearthed in the Construction Area of the Zoo

18 August 2024

18 August 2024

An ancient burial site with 148 tombs,  spanning over 2,100 years, has been discovered on the construction site of the...

A Nymphaeum was discovered in the ancient Thracian city of Perperikon

18 August 2023

18 August 2023

New researchs uncovered a huge monumental sanctuary of water (Nymphaeum) above the reservoir in the southern quarter of Perperikon. Professor...

Multiple Burials found at Çatalhöyük

17 September 2021

17 September 2021

Multiple burials were unearthed during the ongoing excavations in the house on the eastern mound of the Neolithic settlement Çatalhöyük....

Archaeologists in Peru discover a mummy tied with 800-year-old ropes

28 November 2021

28 November 2021

On Peru’s central coast, archaeologists discovered a mummy estimated to be at least 800 years old. The mummy’s body was...

Treasure hunters revealed a 2,700-year-old Urartian temple In the east of Turkey

18 June 2022

18 June 2022

Treasure hunters revealed a 2,700-year-old Urartian temple A group of treasure hunters, who were digging illegally to find treasure in...

A 2,000-year-old wooden bridge that once linked England and Wales discovered

31 August 2023

31 August 2023

Archaeologists have discovered evidence of Roman and Anglo-Saxon fortifications in the town of Chepstow in the United Kingdom. Surprisingly, however,...

A newly Discovered Church in Sudan could be a Cathedral

2 June 2021

2 June 2021

Archaeologists have found the remains of the largest church known from medieval Nubia in old Dongola (Sudan). Dongola was the...

The history of Kültepe Mound in central Turkey goes back another 300 years

12 December 2021

12 December 2021

In Kültepe, where the first written documents of Anatolia were unearthed, the date based on 5 thousand years was updated...

Rare Incense Burner Depicting Egyptian God Serapis Unearthed in Ancient City of Ephesus

8 December 2025

8 December 2025

Archaeologists working in the ancient city of Ephesus, one of the world’s best-preserved archaeological sites and a UNESCO World Heritage...

4,400 Years Old Shaman Snake Staff Found in Finland

29 June 2021

29 June 2021

A very well-preserved 4,400-year-old Shaman Snake Staff made of wood has been found in Finland. The “Snake Staff” found is...

8th-Century Tang Dynasty Tomb Unearthed in China Reveals Vivid Murals — and a Blond Foreigner

15 October 2025

15 October 2025

Archaeologists in northern China have uncovered an exceptionally preserved 8th-century Tang dynasty tomb whose breathtaking murals offer a window into...

Beer remains that are 9,000 years old have been discovered in China’s unique Hu pots

3 September 2021

3 September 2021

Archaeologists in southeast China have discovered evidence of beer consumption in ceramic vessels at the burial site called Qiaotou. The...

The world’s largest Byzantine winepresses have been discovered in Israel

11 October 2021

11 October 2021

Archaeologists say they’ve discovered the world’s largest known Byzantine-era winery in the city of Yavne, south of Tel Aviv. The...

Paleonursery offers a detailed glimpse at life 518 million years ago

6 July 2021

6 July 2021

Fossilized specimens of thousands of undersea animals buried under a sedimentary avalanche 518 million years ago have been found near...

From the Balkans to Rome: How Bosnia, Serbia, and Kosovo Quietly Strengthened an Empire

14 December 2025

14 December 2025

For centuries, the strength of the Roman Empire has been explained through its armies, its roads, and its conquests. Histories...