Poché

Definition

Poché is a Beaux-Arts architectural term for the space in the walls — the past participle of the verb pocher (to pocket, to pouch). What architects are taught to draw as solid by filling the area between rooms with black ink, suggesting a monolithic wall, is "in fact entirely hollow and void." Poché is the domain of services (columns, beams, staircases, corridors, secret passages for servants) and, in books and movies, the domain from which ghosts and monsters enter living spaces. In Spuybroek's theory, poché is the architectural name for the "thickened" or "doubled" space that appropriation produces — the hollow zone between presence and absence where things flicker. The smallest pockets of poché act as "portals that give access to the largest playing fields."

A second, fabricated register appears in Marc Manack's chapter: poché as the character-giving thickness that distinguishes interior from architecture — historically in premodern solid construction ("The massiveness and opacity of the construction enabled expressive, unique, and often counterintuitive distinctions in the formal presences, spatial qualities, and surface effects between inside and outside, establishing unique identities between architecture and interior through the use of poché and ornamentation to create character"), and now digitally materialized. In Marlon Blackwell Architects' Crystal Bridges Museum Store, the sectioned wood ribs make the drawing's convention perceptible: "The thickness of the construct is visible, an experience that was once only available through the abstraction of section drawing. The space of poché is now embodied in the material perception of the digitally fabricated rib." Where the Beaux-Arts poché was filled (the drawn solid that is "entirely hollow"), Manack's poché is the revealed gap — the envelope that "never touch[es] the surrounding construction, with continuous reveals at the perimeter," hovering: thickness exhibited as separation. See fabrication.

A third, perspectival-illusory register appears in Laura Garófalo-Khan's chapter: poché as the grotto's immersive, undoable depth. Of the Grotta Grande at the Boboli Gardens: "The immeasurable depth of the poché between the inside and outside enhanced the separation between the two worlds. While this boundary's physical presence implies great thickness, it undoes itself through the greater perspectival depth of its inner caparison" — painted Arcadian landscapes, "fantastical stone narratives, live plants, and trickling water" filling the layer between inside and exterior ("interior and exterior could be separated by two inches or two hundred feet"). Where the Beaux-Arts poché is drawn solid and Manack's is a revealed gap, the grotto's poché is illusory depth: thickness simulated by representation in order to displace the viewer "both physically and temporally." And the register's contemporary terminus inverts the term's materiality: Aybar Mateos's Bienvenidos al Sur — "The architecture dissolves; what remains is a porous floral poché" — poché made of plants rather than walls, a "thicket" whose modulating depth ("moisture, light, air, smell, and sound") replaces the sealed envelope. See artificial-grotto and performative-ornament.

Key Thinkers

• lars spuybroek — develops poché as the architectural name for the thickened space of appropriation; the hollow wall as portal between interior and gameboard.
• Marc Manack — the fabricated register: premodern poché creating interior/architecture character, and the digitally fabricated rib as poché "embodied in the material perception" — thickness made visible as separation.
• Laura Garófalo-Khan — the perspectival-illusory and porous-floral registers: the Grotta Grande's poché that "undoes itself through the greater perspectival depth of its inner caparison," and the thicket's "porous floral poché."

Related Concepts

• appropriation — poché is the spatial product of appropriation; the thickened zone where things are drawn in and suspended from their original meaning.
• dwelling — poché as the architectural condition of dwelling's "thickening."
• everyday life — the invisible zone of habitual inhabitation; "it lies in the nature of architecture to disappear during the act of appropriation."
• Interior Architecture — the discipline whose distinguishing thickness poché becomes in Manack's account: "unique identities between architecture and interior through the use of poché and ornamentation to create character."
• Boundaries — the revealed separation: the continuous reveal and hovering envelope as the boundary made perceptible as a gap rather than a line.
• Thick Edge — poché's urban, socio-spatial cousin (Borden): thickness not in the wall but at the edge, inhabited (the sitable low wall) or engineered uninhabitable (the 45° deviation leaving "only 150 millimetres clear").

Source Support

Sources in the wiki that discuss this concept:

• Habit and Inhabit, Stuff and Trash (Spuybroek 2025) — the primary source; poché as the hollow, thickened wall-space of appropriation.

• Toward an Architecture of Enjoyment (Lefebvre 2014) — Lefebvre's porous space as the expansion-form of the thickening that poché names.

• Proximities (Taylor & Preston 2006) — a historical instance of inhabited poché: the dressing-table niche "behind the opaque panelling," "a space within the wall" whose mirrored interior "expands infinitely" and whose doors close so "the wall absorbs the secrets of the situation" (p. 7) — "What appears as a small enclosure is a mode of liberation" (p. 7).

• Fabricating interiority (Manack 2018) — the fabricated register: premodern solid construction establishing "unique identities between architecture and interior through the use of poché and ornamentation to create character"; the Crystal Bridges Museum Store's sectioned wood ribs — "The thickness of the construct is visible, an experience that was once only available through the abstraction of section drawing. The space of poché is now embodied in the material perception of the digitally fabricated rib"; the envelope that "never touch[es] the surrounding construction, with continuous reveals at the perimeter."

• Sensorial interior landscapes (Garófalo-Khan 2018) — the perspectival-illusory register: the Grotta Grande's "immeasurable depth of the poché between the inside and outside… While this boundary's physical presence implies great thickness, it undoes itself through the greater perspectival depth of its inner caparison," painted with Arcadian landscapes or covered in "fantastical stone narratives, live plants, and trickling water"; and the porous-floral terminus — "The architecture dissolves; what remains is a porous floral poché." See artificial-grotto, performative-ornament.

• Thick Edge (Borden 1996/2006) — the urban-poche register, politicized: the edge's inhabitable thickness as a social resource — the Holy Trinity low wall "of the right depth and height to sit and, potentially, to sleep upon," where the homeless "recomposed a niche space from layers of clothes, cardboard and classical architecture" — and its deliberate destruction: the blue screen's "sudden 45 degrees deviation… leaving only 150 millimetres clear in front," so the wall "becomes too shallow for a person to sleep upon, or to sit upon for any length of time." Poché's civic corollary: who controls the thick zone determines who may inhabit it. See thick-edge, hostile-architecture, appropriation.

• Architectural purgatory (Morey & Alkanoglu 2018) — the dissolved register: "It has destroyed the corner by allowing curves to smooth it into oblivion; it has disfigured poché (the walls, columns, and other solids of a building… usually in black) into a graphic, no longer a negative space of conversation" — technology's erasure of poché's conversational negativity, the chapter's side-audit of what the machine age did to the thick wall. See mechanization.

• Inside Fear: Secret Places and Hidden Spaces in Dwellings (Troutman 1997/2006) — the haunted register, from the inhabitant's side: "In these hollow walls dwells the unknown, the in-between, the impossible, the unseen" (p. 358) — the poché-domain's ghosts given a resident psychology; "Disturbing dreams and repressed fears transform surface into cavity" (p. 357) — the thick wall opened by fear into depth; and the poché-spaces inventoried as the child's territory and the memory's address: the eaves club behind the closet door, the disused dumbwaiter shaft ("the locus of lost things, never to be recovered," p. 357), the cabinet "filled with old things in boxes." Where Spuybroek's poché is appropriation's thickening and the niche a "mode of liberation," Troutman's is the house's unconscious bulk — the hollow the day-side rooms are built around. See hidden-spaces, fear, childhood-spaces.

• source-notes/manack-2018-fabricating-interiority

Open Questions

• Can poché be reclaimed as a design concept — not just a Beaux-Arts convention but a deliberate production of thickened, inhabitable wall-space?
• How does the Beaux-Arts poché (the space of services and servants) relate to its phenomenological refiguring as the space of ghosts, daydreams, and portals?
• Manack's rib makes poché "embodied in the material perception" — but the rib's thickness is a gap between envelope and host, not a pocket inside a wall. Is the materialized reveal still poché (the term's "hollow and void" heritage) or a new condition — thickness as separation rather than thickness as concealment? And can a poché that is designed to be seen still shelter the secrets ("the wall absorbs the secrets of the situation") that the Intimus niche protected?
• Borden adds a socio-spatial test: the sitable low wall is inhabitable edge-depth, and the 45° deviation engineers that depth below the body's thickness. Is hostile design then the deliberate production of negative poché — thickness cancelled — and does the urban poché question ("can poché be reclaimed as a design concept") become a question of who is allowed to inhabit the thick zone?
• The Grotta Grande's poché "undoes itself through the greater perspectival depth of its inner caparison" — thickness that increases separation by faking depth. Is this the concept's representational pole (poché as painted illusion, kin to quadrature), and does it show that poché needs no material at all — only the experience of thickness?
• "What remains is a porous floral poché" (Garófalo-Khan, on Bienvenidos al Sur): poché made of living, permeable matter, modulating "moisture, light, air, smell, and sound" instead of sealing. Is a poché that breathes still poché (the term's hollowness) or the concept's ecological transformation — thickness as medium rather than as cavity?