Pope John XXIII had a warm, down-to-earth sense of humour. One time a new building had to be constructed on Vatican grounds. The architect submitted the plans to His Holiness, who shortly afterward returned them with these Latin three Latin words written in the margin: "Non sumus angeli", that is to say "We are not angels." The architect and his staff were non-plussed as to what the Pope meant, until finally someone noticed the plans did not include bathrooms.
--http://carolinechisholmlibrary.blogspot.hk/2007/09/papal-anecdotes.html
