Inspired by a large tree in the centre of the Alioune Diop University campus, the new lecture building was designed as a place of shelter, shade and freshness for its students. Scarcity of resources conditioned the use of bioclimatic strategies: a large double roof canopy extending 10m over the north façade and latticework covering the south one prevent direct solar radiation while remaining permeable to air. To solve the lack of water and sewers, the architects incorporated infiltration rafts with vegetation that collect rainwater. Waste water is purified through an ecologically sound system that uses activated sludge. The simple yet ingenious building offers facilities for training and research in applied sciences and information and communications technology. It can accommodate up to 1,500 students in its large amphitheatre, differently sized classrooms, technology rooms and laboratories.