bedlam

From Bedlam, alternative name of the English lunatic asylum, Bethlem Royal Hospital (royal hospital from 1375, mental hospital from 1403) (earlier St Mary of Bethlehem outside Bishopsgate, hospice in existence from 1329, priory established 1247), since used to mean “a place or situation of madness and chaos”. Bedlam as name of hospital attested 1450.

Phonologically, corruption of Bethlem, itself a corruption of Bethlehem (the Biblical town), from Ancient Greek Βηθλεέμ (Bēthleém) from Biblical Hebrew בֵּית לֶחֶם (bêṯ leḥem, literally “house of bread”).

However, also compare Spanish belén (“confusion, disorder; a place characteristic of such”).