The chapel has two entrances, the main altar, and three chapels beneath towers. Although the building is small, it is sturdy and sophisticated. The main structure consists of thick masonry walls, which are curved to improve stability and provide structural support. The great curved concrete roof is a shell structure supported by columns hidden in the walls. A gap underneath allows a sliver of light to filter into the interior.

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The irregularly positioned windows reveal the extreme thickness of the walls in the building. The surfaces of the walls, which are covered in white plaster, have a different appearance in the back-lighting; they seem to be more pale grey to dark grey.

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Horizontal cuts across entire façades allowing interior spaces to be equally lit. Not only do these windows enable rooms to be flooded with light, but they also create unencumbered views of the surrounding environment.

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In the interior, the spaces left between the walls and roof are filled with clerestory windows, as well as the asymmetric light from the wall openings, serve to reinforce the sacred nature of the space further and reinforce the relationship of the building with its surroundings.

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The lighting in the interior is soft and indirect, from the clerestory windows and reflecting off the whitewashed walls of the chapels with projecting towers.

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People can be illuminated with light directed from between 30° to 45° to the vertical. The steeper the incident light, the more pronounced the three-dimensionality of the illuminated object. If the angle of incidence of the light is approximately 30°, the so-called "museum angle", this produces maximum vertical lighting and avoids reflected glare that may disturb the observer.