7 March 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

In Poland, a 45-meter-long mysterious tunnel found under the ruins of the Saxon Palace

9 September 2023

9 September 2023

A mysterious underground tunnel was found under the ruins of the Saski Palace in Pilsudski Square in Warsaw, the capital...

The 890-million-year-old sponge fossil may be the oldest animal yet discovered

1 August 2021

1 August 2021

890-million-year-old fossil sponges found in the “Little Dal” limestones of northwest Canada may be the oldest animal ever found. According...

Archaeologists identify a sunken Nabataean temple dedicated to the God Dusares at Pozzuoli

12 April 2023

12 April 2023

Off the coast of Pozzuoli on the Phlegrean Peninsula in Campania, Italy, underwater archaeologists have identified a sunken Nabataeans temple...

Unprecedented necropolis site found in Cappadocia, one of Türkiye’s most important tourism centers

8 July 2024

8 July 2024

In Cappadocia, located in the Central Anatolia Region of Türkiye, known for its unique moon-like landscape, underground cities, cave churches,...

Israeli Archaeologists discover two shipwrecks filled with treasure

22 December 2021

22 December 2021

Israeli archaeologists have been discovered ancient artifacts and treasures amid the wrecks of two ships on the seafloor off the...

The Oldest “Book” of Europe: Derveni Papyrus

4 September 2022

4 September 2022

The Derveni papyrus is considered Europe’s oldest legible manuscript still in existence today. It is an ancient Greek papyrus roll...

Storeroom and Soup Kitchen Unearthed in Ancient Timbriada: New Clues to Pisidia’s Forgotten City

25 September 2025

25 September 2025

Archaeologists have uncovered a 2,200-year-old storeroom and soup kitchen in the ancient city of Timbriada, located in Isparta’s Aksu district....

In Lake Mendota, Wisconsin archaeologists discover the oldest canoe ever found in the Great Lakes region

23 September 2022

23 September 2022

A group of divers from Madison, Wisconsin’s Lake Mendota emerged on Thursday carrying a remarkable piece of history for the...

6,000-year-old island settlement found off the Croatian coast

24 June 2021

24 June 2021

Archaeologist Mate Parica, a professor at the University of Zadar, noticed something unusual while examining satellite images of Croatia‘s coastline....

A 3,600-Year-Old Bronze Minoan Dagger Discovered in Antalya Underwater Excavation

29 August 2024

29 August 2024

A bronze dagger with silver rivets that dates to the Minoan civilization approximately 3,600 years ago was discovered during an...

The Big Universe Coming Out from the Dust “in Esna Temple”

7 February 2021

7 February 2021

While the Esna Temple has been waiting to renew and breathe again for a long time, it has recently experienced...

Roman ‘ritual center’ discovered in England

12 January 2023

12 January 2023

Archaeologists from have discovered a Roman ritual centre during excavations near Northampton, England. The find was made by the Museum...

Newly Discovered 200,000-Year-Old Rock Carvings in Marbella: Potentially Among Europe’s Oldest Cave Art

14 March 2025

14 March 2025

Marbella has just made an incredible discovery that could change everything we thought we knew about prehistoric Europe. Archaeologists working...

Rare Astrolabe Discovered in Verona Sheds Light On Islamic, Jewish, and Christian Scientific Exchange

6 March 2024

6 March 2024

An eleventh-century rare astrolabe bearing Arabic and Hebrew inscriptions was recently discovered in a museum in Verona, Italy. It dates...

2,500-Year-Old Phoenician Shipwreck Being Rescued By Spanish Archaeologists

6 July 2023

6 July 2023

A 2,500-year-old Phoenician shipwreck has been found underwater in the southeastern Spanish region of Murcia. An extraordinary Phoenician shipwreck dating...