Introduction

Excavate, Accrete, Stratify: An Ecology of Ideas traces the conceptual and material trajectories of the architectural praxis of Nisha Mathew and Soumitro Ghosh between 1997 and 2023. Situated within India, an outlying nation at the southeastern edge of the Global South, their work embodies the layered histories of post-colonial negotiation and late-capitalist engagement that have shaped the current directions of architecture in the region. The book positions itself as both archive and inquiry, foregrounding architecture’s diasporic ideas as they circulate across geographies, returning in the form of palimpsestic traces that speak simultaneously to the observer, the voyeur, and the philosopher of architecture’s beginnings and endings. Emerging after the formative generation of Indian “Masters” (Peter Scriver referred to this generation in his book After the Masters: Contemporary Indian Architecture (Mapin Publishing: Ahmedabad; Grantha Corporation: New York, 1990) who engaged directly with Le Corbusier, Louis Kahn, and Walter Gropius, Mathew and Ghosh’s work belongs to a subsequent lineage of Indian architects educated and rooted locally, yet in dialogue with global discourses. In the work of Mathew and Ghosh, local functions as a scalar and historically contingent concept that is intimately tied to the specific place and time of each project. It encompasses not only the physical and spatial geographies of a site but also its layered fragments of history and the social and cultural life of its people. Each project’s locality is therefore situated; shaped by temporal conditions, inherited forms, and the human networks that animate the space. At the same time, there is a broader spatial resonance across India. Despite the immense regional diversity, many localities share a common spatial grammar derived from vernacular, often agriculturally based, typologies. Courtyards, verandas, plinths, porches, for instance recur across regions, forming a shared architectural vocabulary that is widely legible to Indian inhabitants. Mathew and Ghosh’s work engage with this dual sense of local, attentive to the particularities of each site while simultaneously drawing upon a widely understood vernacular language. Their projects reveal how local is neither fixed nor purely regional but a dynamic interplay of history, geography, and lived experience, mediated through an architectural language that resonates both specifically and collectively. This generation inherited Modernism’s spirit of inquiry but re-situated it within a framework of local expression, ecological awareness, and cultural specificity. Their practice can thus be read as both a continuation and a transformation: excavating inherited modernist legacies, accreting the sediment of lived contexts, and stratifying these into architectural propositions that articulate the fragile balance between universal ideals and situated realities. This work also attempts, though autobiographical, to situate the architects’ practice within a wider intellectual arc, linking ideas originating in Europe in 1969 with their re-interpretation in India’s contemporary architectural landscape. In so doing, the book foregrounds Mathew and Ghosh’s contribution to an evolving architectural worldview: one that negotiates ecology, memory, and futurity, while charting new maps of inhabitation in the global South.