The complex triangular form of the site led us to design a continuous volume with a succession of folds that unfurl along the north and the east facades, topped by a wide bridge along the south facade. At the middle of these folds is set a large hollow volume, orientated to the south and sheltered by the bridge that overhangs it. This magnificent conch shell-like form is an extra element, a meeting place for all the users of the different programmes, a café with a terrace looking out over the train station, which faces us.