Microwaves and Papal links

Although at this stage of his life, Marconi was taking less of a day to day interest in the technology and business affairs of his company he never fully retired.With new radio communications technology becoming available, he was able to investigate the use of very short wavelength signals. In particular he was interested in whether it was possible to establish two way radio communications links over paths that were beyond the line of sight.As Cristina was the daughter of a Vatican official, Marconi established a radio communications link between the Vatican City and Castel Gandolfo, the summer residence for the Pope.