The spaces are divided into four areas that, although independent, are connected by exterior areas in a game of solids and voids. The courtyard is a key functional element, it is a play area for local children and a place to hold open-air exhibitions. The rooms are placed next to each other throughout the volume.
When choosing materials for the construction of the project, it was decided to use unsophisticated local materials obtained within a 50-kilometer radius of the site, both inside and outside the building. These include exposed red brick walls and natural stone floors.
Subterranean Ruins by A Threshold. Photograph by Edmund Sumner.
Project description by A Threshold
Just outside the Indian village of Kaggalipura, some 40 km south of Bangalore in the state of Karnataka, a series of brick walls peeps through the dense tropical vegetation of mango, banana, coconut and sugar cane. Although resembling ancient ruins, the structures – aptly named “Subterranean Ruins” – are part of an unusual architectural project by the architecture practice, A Threshold. Not far from Bannerghatta National Park, an ideal destination for birdwatchers, the village of Kaggalipura named after the Kaggali tree (Acacia catechu), a constant feature of the rural landscape of this important agricultural area, is home to a few thousand inhabitants, many of whom – laborers, artists, and craftsmen – were directly involved in the building process.
The clients were a couple of philanthropists, who, alongside the private section, wanted a multifunctional public centre freely accessible to the villagers. The brief demanded that the complex should not be limited to a specific functional program but rather should be able to host school classes, children’s workshops, seminars, exhibitions, concerts, and other events, but also double up as guest quarters for the owners’ visiting friends.
Subterranean Ruins by A Threshold. Photograph by Edmund Sumner.
Volumetrically, the project design took its cue from the natural elements on the site, in order to seamlessly integrate the new, single-level building into the landscape. None of the existing trees were sacrificed and the steeply sloping site was exploited to create underground spaces. As a result, the complex is not immediately apparent to the visitor, whose gaze is first drawn to the planted roofs, and only subsequently to the main entrance along the basement front. Perfectly camouflaged in the natural landscape, the complex seems almost uninhabited. The structure resembles the remains of some ancient abandoned site. The large arches of different shapes and sizes have been given a rough look making them seem the walls of buildings going back to some ancient past.
The Subterranean Ruins are made up of four areas, which although independent, are connected by outdoor areas in an interplay of solids and voids that lend balance and harmony to the whole. The courtyard is a key functional element. An outdoor play area for local children, it can also be used by local artists as an open-air exhibition spaces. The rooms are placed side by side lengthwise, like a gently curving sequence of row houses. Their north-south orientation means they benefit from the evening sun but also have a continuous flow of air from a second, lower-level court, which also brings light and air to the rear of the building. The layout and furnishings of the rooms have been designed to allow the environments to serve as bedrooms or living areas, exhibition rooms or classrooms. The custom-designed interiors are mostly the work of A Threshold; any other fixtures and fittings were chosen by the firm. In addition, all spatial reconfiguration requirements are curated by the architects.
Subterranean Ruins by A Threshold. Photograph by Edmund Sumner.
Unsophisticated local materials sourced within a 50-km radius of the site were used for both exteriors and interiors. These include exposed red brick walls and natural stone flooring –rough-finished for the exteriors and smoothed for the interiors. The cobblestones of the courtyard come from a nearby black-granite quarry. Both the materials and the construction techniques reflect the project’s underlying environment commitment.
Boulders excavated on site were used for the retaining walls; concrete was used only for the floor slabs, and the mortar for joints contains only 5% cement. Energy consumption is also environmentally compliant, the underground sections and ample shading afforded by the trees doing away with the need for air conditioning, while the sloping site is exploited to create a stormwater collection system supplying irrigation to the local fruit orchards.
