An unbelievably insane project by Junya Ishigami. The cafeteria pavilion for Kanagawa institute is developed horizontally on a single floor, with a surface of about 110 x 70 m, and covered by a thin steel roof that floats at a height of approximately 2,3 m. It is one of the most phenomenal engineering challenges to have ever faced a university cafeteria, because this room is the size of a football pitch, and not a single column supports the roof throughout the entire span. This roof is a single, thin (nine-millimetre) sheet of tensioned steel, perforated by unsealed rectangular openings that allow light and elements to enter the space, creating a semi-enclosed garden. Above, a thin layer of soil transforms the roof itself into a landscape of grass and vegetation. It is simultaneously megastructural and intimate, effortless as a gesture and bewildering in its scale, and like Ishigami’s previous works it has a deeply human dimension: as the steel roof plate expands and contracts with changes in temperature, the ceiling height varies by as much as 80 centimetres, as though the building were alive and breathing.