Norwich School pupils bedded down on the cold floor of the cathedral's cloisters on Saturday night to support a homeless charity.
The sixth form students spent the night sleeping rough in aid of the St Martins Housing Trust and raised over �400.
The 43 pupils kept spirits up with ghost tales about the cloisters from Norwich ghost walker, the man in black, arm wrestling competitions and songs.
Inny Agnew, 17, said: 'It was really successful but I didn't expect it to be that cold.'
Organiser Alex Boyt said they managed to get around two hours of sleep.
And Derek Player, general manager at St Martin's Housing Trust, said: 'Successive generations at the school have taken an interest in the plight of homeless people in Norwich and I think we at St Martin's are delighted that this tradition is being kept up.'
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