Celi has long been involved in civil projects, collaborating with internationally renowned architects, designers and engineers.
These include the historic Auditorium of Confindustria, designed by architect Pierluigi Spadolini. It was inaugurated on May 30, 1974, on the occasion of the General Assembly of Confindustria, during which Giovanni Agnelli was elected president.
Since then, and for more than four decades, with its 18 modular halls and vast multifunctional areas, it has played an important role in terms of efficiency and functionality in the varied conference offerings that have developed in the city. Celi collaborated with Renzo Piano, an internationally renowned architect, on the "Parco della Musica" Auditorium in Rome.
The “Auditorium Parco della Musica Ennio Morricone” represents one of the most important urban and cultural interventions carried out in the capital since the 1960s. It is currently managed by the Fondazione Musica per Roma,
The facility is located a short walk from the historic center, between the banks of the Tiber River, the Parioli district and the Olympic Village. A refined musical architecture, a large multipurpose complex capable of meeting the needs of different audiences, combining quality and entertainment, culture and entertainment.Celi also provides its contribution to Designer Luigi Sturchio for the realization of the Majestic Hotel in Rome.