Guru Nanak in Italy

A Quote:
Travels Of Guru Nanak written by Prof. Surinder Singh Kohli in 1969 and published by Publication Bureau,Punjab University, Chandigarh. In his chapter "Turkey And Beyond Turkey" on page no. 152-154, the respected Prof. has mentioned that----"Various Sikh scholars have expressed their opinion that the Guru who had visited all the prominent religious centres, could not ignore Vatican(Rome) in Italy,which is the seat of Pope or the Head of the Catholic Church.Therefore his visit to Rome in Italy can not be ruled out."