As part of the Chrysalis project, Bouygues Bâtiment Ile-de-France was responsible for the full renovation of Paris Zoological Park, which first opened in 1934. Every care has been taken to ensure the well-being of the animals in the new zoo, with in particular the installation of heating from fake rocks and the construction of a tropical greenhouse which is heated to 25°C all year round. Visitors can observe animals living in virtual freedom in five vast bio-zones that include 16 ecosystems. Under the terms of a PFI contract, Bouygues Energies & Services is responsible for maintenance and cleaning for 25 years working alongside the veterinary staff and animal keepers.