Felix Michaud photographs Valerio Olgiati's 2010 Plantahof Auditorium in Landquart, Switzerland — a dark concrete essay on structural hybridity, half-light, and the Prättigau valley.
The Plantahof Auditorium does something simple and decisive: it creates a new central square. The addition to an existing campus of agricultural buildings doesn't announce itself as civic infrastructure, but the height and mass of its facade gather the surrounding structures into a courtyard that wasn't there before. The square becomes legible because the auditorium exists. The building earns its presence by making the space around it matter.
Olgiati's structural proposition is a hybrid: the dark-coloured concrete wall is thin, stretched over pillars and beams the way canvas is stretched over a frame, then tied to the ground through external abutments on either side. The result is a building that reads simultaneously as frame construction and solid construction, each system qualifying the other. The architecture is not reducible to one idea — that indeterminacy is precisely what gives it character.
Inside, the auditorium sits in half-light. Two windows positioned on opposing walls define the interior space and permit a view from the new piazza toward the axis of the Prättigau valley beyond. The hall seats 130 to 180, depending on arrangement. The multipurpose program — seminars, congresses, lectures — is ordinary. What is not ordinary is the quality of the light and the relationship it establishes between the interior and the valley outside.
This photographic essay treats the building as subject rather than document. The concrete mass is rendered in the overcast light of the Alps — close enough to become texture, wide enough to show the building's relationship to the surrounding landscape. The diagonal abutment appears as a sculptural object against the wall plane. The corrugated roof and the grass field situate the auditorium in an agricultural context that the building does not try to escape or transcend.
What stays in the mind is the contrast between forms of the same material vocabulary: the massive dark facade and the lightweight roof, the sealed exterior and the precisely positioned apertures, the austere whole and the specific Alpine backdrop that presses against it. Olgiati does not smooth this contrast. He keeps both realities in tension — and the images hold that tension in frame.
