A brutal simulation of one of the cruelest forms of capital punishment has left viewers in tears.
The history of the torture method dates back to the Roman empire, when it was used as a punishment for a certain group of women.
Known as immurement, it was sometimes used as a form of imprisonment for female priests who broke their vows.
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The Vestal Virgins were a class of priestesses who followed a strict vow of celibacy, fully committing themselves to Vesta, the goddess of home and family.
However, if the priestess broke her vow, she would be punished by immurement, which involves enclosing a person within small walls, and effectively entombing them alive.
This could sometimes be in a wooden box, a locked coffin, or even bricked walls.
YouTuber Zack D. Films - who has shared a horrifying simulation of the torture method - explained: "The process starts by enclosing a person within a wall, leaving no exits.
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"Unlike being buried alive, you wouldn't die from lack of air.
"In some cases, the person was given just enough food and water to survive for years."
The simulation is an animation of a woman being stuck in a brick-layered box, being fed tiny amounts of food, just enough to stay alive, while in suffering.
"Prolonging the agony and isolation, victims were sometimes forced to stand upright, unable to sit or rest," Zack added.
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"Their legs swelling from the lack of movement.
"Many died slowly, completely isolated, left to suffer until the end."
According to 'Vestal Virgins: Chaste keepers of the flame', the order was present for around 1000 years, though this hasn't been verified.
Viewers were horrified by Zack's video, with one person commenting: "Whoever designed this is an absolute monster."
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Another added: "This is so terrifying. The animation of the guy crying pretty much showed how bad this punishment was."
A third person wrote: "Dude the animation on this was so good that when he started crying, I felt bad."
A fourth thought what we were all thinking, penning: "This is heart-breaking. I cannot fathom how horrific people treated other living humans in the past it makes me feel so bad."
Someone else also said: "This punishment is brutal! I would even try to protect my enemies from this!"
While cultures across history practiced this punishment, immurement is obviously no longer a thing.
Anish Vij