The bone of the first apostolic father of the church was found by an environmental waste clearance company during a routine waste haul in central London.
Enviro Waste said it found the bone in a red and gold, wax-sealed case, during a routine collection in central London last year, but workers didn't realise what they had until it was appraised several days later.
James Rubin, owner of Enviro Waste said: "You can imagine our amazement when we realised our clearance teams had found bone belonging to a Pope - it's not something you expect to see, even in our line of work. We often come across some weird and wonderful things on clearances, but we were definitely not expecting to find a bone fragment of an apostle.
"We know this is an important piece of history and are keen to find the most appropriate place for its final resting place, which is why we're asking for help from members of the public."
The company has asked for the public to vote on where the bone should now be stored.
Pope St Clement is considered to be the first apostolic father of the church, the third successor to St Peter and the fourth Pope.
He was known as St Clement of Rome and was Pope from 92 to 101 AD. He is believed to have died in 110 AD at the age of 75, making the bone nearly 2,000 years old.
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