At Villa Necchi Campiglio, a heritage of FAI (Italian Environment Fund), a stable structure was created to cover the tennis court no longer used for its original purpose. The project envisaged the insertion of a simple and neutral structure inside the existing iron fence, designed by the Architect Piero Portaluppi in the 1930s, highlighting the original design with its mouldings. For this purpose, a solution was adopted for the glazed walls and the roof in iron and glass that keeps the glass envelope completely extrados, i.e. placed towards the outside of the greenhouse, concealing the metal elements of the structure and sliding door frames as much as possible. A roller blind system was placed above the roof to ensure optimal thermal and environmental lighting values. The greenhouse has a block of services, which contain the wardrobe, the bathrooms and a room used as a control booth. The installations guarantee the heating by an air system, integrated with a radiant floor system, the driving force, the lighting of the rooms, the emergency lighting, the sound projection and diffusion. The new structure that was created is used for entertainment in general: it hosts exhibitions and events open to the public, as well as private events.