It's called 'immuration' and was, apparently, quite common. There are tales of husbands immuring wives. :( There were also the 'oubliettes', which may have been even worse. Bottle-shaped dungeons into which someone was chucked and forgotten about. The person presumably landed, hurt, amongst skeletons and the near-dead. Quite nasty, but that was life - 'nasty, brutish and short'.
well these are all different things
I think it was probably Little Ease ( guy Fawkes got it for a week or two along with Question Extra-ordinary (the rack))
an oubliette is usually a bottle shaped room you can move around in with a trapdoor in the ceiling - where you are put and forgoooooootten !
Ugolino n his leedol kiddies are walled up....( er immured)
and he eats them ....
and finally the awful Mrs Shand Kydd - Di's mother got the droopies towards the end of her own life and immured herself in cell in Scotland comtemplating if she had been a bad mother .... well that shouldnt have taken her long but it did.
https://en.wikipedia.org/wiki/Frances_Shand_Kydd#Divorce_and_remarriage
I’m going to have to wait for the TV programme to be repeated, I suppose.
In it, a prisoner was forced to lie on the floor; a large stone was removed from the wall at ground level. He was made to slide in, then the stone was replaced.
Some days later, he was released and “the questions” were again put to him.
As a claustrophobe, I can think of few worse tortures.