“The Normans began construction more than 900 years ago on the building that would become Leicester Cathedral, but legend has long had it that the site has been one of worship as far back as the Roman occupation of Britain. Now, an archaeological discovery has experts suggesting the legend may well be true. Excavations have uncovered what is believed to be an altar stone, found within the cellar of a Roman building they say is probably the remains of a private shrine or cult room.”—”Folktale becomes reality as Roman altar unearthed at Leicester Cathedral. Archaeologists find broken altar stone in cathedral gardens they say was likely used as private shrine or cult room.”

Also

“Shrine believed to be dedicated to the ancient Greek god Dionysus discovered in Leicester.”

“Roman shrine discovered near Leicester cathedral graveyard. Archaeologists have discovered what they believe to be a Roman shrine buried beneath a former graveyard next to Leicester Cathedral.”

“1,800 year-old evidence of Roman worship found in Leicester Cathedral dig.”

And, more about this, 15mar2023:

“Given that we’ve found a potential Roman shrine, along with burials deliberately interred into the top of it after it’s been demolished, and then the church and its burial ground on top of that … are we seeing a memory of this site being special in the Roman period that has survived to the present day?”—”Excavations Around Leicester Cathedral in the U.K. Have Turned Up a Roman Shrine Archaeologists Call a ‘Cult Room’.”