Osram lends St. Peter's Square in Rome a new sense of radiance. Following refurbishment, modern and energy-efficient outdoor LED luminaires provide a unique lighting experience and also save energy of approximately 70%. The project concept by Direzione dei Servizi Tecnici del Governatorato dello Stato della Città del Vaticano was realised with support from Osram, the reference partner for global lighting expertise. Cooperation with Servizi Tecnici del Governatorato was also fundamental for the success of the important Sistine Chapel project, carried out in 2014. The new lighting system for the Sistine Chapel featured higher lumen-output and artwork-conserving LED lighting to protect and enhance Michelan-gelo's renowned frescoes. It also served as a benchmark with regard to artistic, historical and preservative aspects.