A dense program on a small site, with four magnificent cedars taking up half of the buildable area. No way we cut them down, the school will have to squeeze in the remaining corner. Un mal pour un bien. The floors are paired to form small-scale clusters of classrooms, organised as maisonettes. Pushed all the way up on the roof, the sports hall is consoled by having Lausanne’s finest view of the Mont-Blanc. Alongside the cedars, a vertical playground rises through the building, holding together its different programms within a continuous topography of play.