‘A Most Vile Prison’: Archaeologists In England Uncover A Medieval Dungeon Beneath Leicester’s Market Place

Published September 24, 2025

The discoveries were made during the development of a new square at Leicester's market place, an area that has gone relatively unexplored by archaeologists until now.

Leicester's Medieval Dungeon Site

University of Leicester Archaeological ServicesExcavations in Leicester revealed a number of important historical artifacts, including the remains of a “vile” dungeon.

During preparations for a new market square in Leicester, England, archaeologists have uncovered layers of history dating back to the Middle Ages and Roman times. Among these layers is a chilling artifact from the city’s past — a medieval dungeon once called “a most vile prison.”

Archaeologists are thrilled with the new finds, which offer a rich look at the city’s long history. “The discoveries,” remarked Dr. Gavin Speed, the leader of the excavation, “have surpassed our expectations.”

The “Vile” Dungeon Found Beneath Leicester

According to a press release from the University of Leicester Archaeological Services, which organized the excavation, the project began ahead of the development of a new market square. The dig revealed several layers of Leicester’s history, going back 2,000 years, but some of the most chilling finds at the excavation site came from the medieval period.

Leicester's Medieval Cobblestones

University of Leicester Archaeological ServicesCobblestones from the medieval layer, uncovered by archaeologists.

There, archaeologists found various surfaces from a medieval market, a stone-lined well, and the remains of a dungeon.

The dungeon is believed to have once been part of the Gainsborough Chamber, a civic building and the site of “judicial proceedings, mayoral business, feasting, and celebrations,” which was first mentioned in the historical record in 1533 and was demolished around 1748. The dungeon itself was seemingly a grim place, with one account describing it as a “most vile prison” where inmates were forced to lie upon “hard planks without bed or straw.”

It made up a key part of the medieval landscape uncovered by archaeologists, which excavations suggest was once an active hub.

“Remarkably, just below the modern ground surface, we have discovered the earliest medieval market place,” Speed explained. “This consisted of compacted pebbles, overlain by silts and successive resurfacing layers. It’s like looking at a slice through an archaeological cake. We can see multiple market surfaces, each representing a different generation and some 800 years of market activity. We have even identified traces of former medieval market stalls, preserved as post-holes.”

Archaeologist Documenting The Leicester Site

University of Leicester Archaeological ServicesAn archaeologist documenting the Leicester excavation site.

But the dungeon and other medieval artifacts were some of the more recent finds uncovered by archaeologists. At the site, they also found evidence of Leicester’s ancient past, stretching back millennia.

“Multiple Eras Of Leicester’s Past” Unearthed At The Market Place

During their excavation in Leicester, archaeologists uncovered “extraordinary evidence of 2,000 years of human activity” dating back to the Roman era — as well as the Anglo-Saxon era that followed it.

Wall At Leicester's Excavation Site

University of Leicester Archaeological ServicesThe excavation site revealed multiple layers of Leicester’s history.

From Roman times, archaeologists uncovered Roman pottery kilns, the remains of Roman buildings, and even a Roman infant who had been buried beneath a timber floor some 1,800 years ago. In ancient Rome, it was a common practice to bury babies beneath or near one’s home.

“We anticipated finding evidence of Roman occupation, as the market place sits in what would have been the south-east corner of Roman Leicester, but the discoveries have surpassed our expectations,” Speed said. “Our excavations have revealed the well-preserved remains of two Roman buildings. The earliest was a timber structure…[and] a later Roman building, this time constructed in stone, was built directly over the earlier timber house.”

Archaeologists additionally uncovered Roman tesserae, the small stone cubes that were used in mosaics, as well as pottery, coins, and jewelry. They also identified “thick soil layers” from the Anglo-Saxon era, which followed the decline of the Roman Empire, and, according to Speed, is a “poorly understood chapter in Leicester’s history.”

“Analysis of these soils may shed light on whether and how people continued to live among the ruins of the former Roman city,” he remarked.

According to Leicester’s mayor, Peter Soulsby, the site will eventually be paved over in the future. And as such, it’s “important that we take the opportunity to learn as much as we can about its past.”

Archaeologists have certainly learned a lot so far. During their excavations in Leicester, they found thousands of years of human history that ranged from the mundane, like mosaic stones and market stalls, to the tragic, like dungeons and buried children.


After reading about the “vile” dungeon found during an archaeological excavation in Leicester, England, discover the dark story of oubliettes, the medieval pit-like dungeons where prisoners were left to die forgotten. Or, learn about some of the world’s most haunted castles.

author
Kaleena Fraga
author
A senior staff writer for All That's Interesting since 2021 and co-host of the History Uncovered Podcast, Kaleena Fraga graduated with a dual degree in American History and French Language and Literature from Oberlin College. She previously ran the presidential history blog History First, and has had work published in The Washington Post, Gastro Obscura, and elsewhere. She has published more than 1,200 pieces on topics including history and archaeology. She is based in Brooklyn, New York.
editor
Jaclyn Anglis
editor
Based in Brooklyn, New York, Jaclyn Anglis is the senior managing editor at All That's Interesting, where she has worked since 2019. She holds a Master's degree in journalism from the City University of New York and a dual Bachelor's degree in English writing and history from DePauw University. In a career that spans 11 years, she has also worked with the New York Daily News, Bustle, and Bauer Xcel Media. Her interests include American history, true crime, modern history, and science.
Citation copied
COPY
Cite This Article
Fraga, Kaleena. "‘A Most Vile Prison’: Archaeologists In England Uncover A Medieval Dungeon Beneath Leicester’s Market Place." AllThatsInteresting.com, September 24, 2025, https://allthatsinteresting.com/leicester-england-medieval-dungeon. Accessed September 25, 2025.