The 21st century school will be environmental or it won’t exist! In this project, it was not simply a matter of rebuilding a school complex, but of effecting its transformation into an “eco-school”. Siting choices make it possible to go beyond the performative character of eco-construction, too often reduced to questions of figures and performance, and instead afford greater place to the concepts of mood and atmosphere. The school complex is in a park at the centre of a block, introducing a fresh-air oasis and change of surroundings into a rather dense urban environment. The reversal of the access arrangements accentuates this effect, since it emphasises the proximity of the school to the linear garden that will soon be planted on the former inner ring railway line in the southern part of the plot.