The Decadent literary tradition in England and France in the nineteenth century is characterized by compartmentalized, interiorized, and curated spaces, which, typically, are retreats from urban life evoking subjective states of mind and strange sensations. As Jean Pierrot (1977) and Jan B. Gordon (1979) have argued, Decadent retreats have much in common with the ‘locked room’, but on closer analysis, as this thesis aims to show, Decadent spaces are much more than just places of entrapment. Decadent spatiality, rather like the literary tradition itself, defies clear definition. It is complex and polyvalent, cutting across and calling into question the notions of borders and boundaries. The private and public spaces that we encounter in both...