This research work – part of a phd thesis in co-supervision between the " Sapienza " University of Rome and the University of Paris 1 “Panthéon- Sorbonne” - has the objective of investigating the lesser-known aspects of the life of architect Giovanni Niccolò Servandoni, especially the period of his training in Florence and Rome, and the years when he lived in England before his arrival in Paris in 1724. At the same time he was painter, architect and decorator and his name was famous thanks to a large number of sets made for the Opéra and to the design of the façade of the church of Saint- Sulpice in Paris. During his life, Servandoni had the opportunity to travel throughout Europe, where he worked for the major courts of that time, from Par...