 A St Sulpice booklet dating from 2000, in the pages about the history of the gnomon, describes the brass line as "a meridian"; it does not use the term "Roseline" or "Rose Line".Paul Murdin describes such sun lines as a "Meridian", or "meridiana".Brown identified the Paris Meridian with the alleged bloodline of Jesus Christ and Mary Magdalene as well as Rosslyn Chapel, the central part of his novel.