Vesica Piscis X sign The Flag of the Church of Scotland - bearing a Mosaic "burning bush" motif. The "fiery tree" with 3 roots is, however, Druidic in origin, as is the zodiacal cross in the background. This cross is also meant to symbolize the numeral 1O (Ten), another insignia of Aten or Aton (Ten). See 10 Downing Street. "X" stands for Aton and also for the biblical hero Nimrod, known as the "mighty hunter of Jehovah" http://www.irishoriginsofcivilization.com/irishoriginsexcerpts/book2_chap41.html