Alternative writings

Ya really, they do. Apparently they got so fed up by people coming there on the Da Vinci tour that they have this notice (not necessarily a plague but...) in the Church:

"Contrary to fanciful allegations in a recent best-selling novel, this [the line in the floor] is not a vestige of a pagan temple. No such temple ever existed in this place. It was never called a Rose-Line. It does not coincide with the meridian traced through the middle of the Paris Observatory which serves as a reference for maps where longitudes are measured in degrees East or West of Paris. Please also note that the letters P and S in the small round windows at both ends of the transept refer to Peter and Sulpice, the patron saints of the church, and not an imaginary Priory of Sion."