The project aims to renovate an old synagogue that has now been converted into a socio-cultural centre. The building built in the early 1970s is a building of many qualities, offering generous space to host a cultural institution. The bias is to make use of the ‘already there’, to reveal the architectural and spatial qualities in place through a series of interventions and measured actions, while respecting the value and history of the place. All the walls shall be insulated, whether new or existing, the rear façades shall be insulated from the outside, the front façade, preserved, shall be insulated from the inside, the adjoining façades, preserved, shall be insulated from the inside. Insulated floor slab, the roofs will all be insulated from the outside. All the glazed chassis complexes are replaced by new ones. Ventilation will be provided exclusively via dual flow air handling units with heat recovery and 100% bypassable exchanger