Hegningarhúsið (Icelandic pronunciation: [ˈhɛkniŋkarˌhuːsɪθ], "The Penalty House") at Skólavörðustígur 9 in Reykjavík was a prison run by the Icelandic Prison Service.
W. Klentz,[1][2][3] it was the oldest prison in Iceland.
[5] The origins of the Icelandic phrase "going to the stone" (fara í steininn) is purportedly due to the stone interiors of this prison.
[6] It was last used as a reception prison, where prisoners stayed for a short period of time when at the beginning of serving a sentence.
[5] There were 16 prison cells in Hegningarhúsið, small and narrow with poor ventilation.