Still found in some parts of Italy, Germany and France – ''Sator Squares'' were Ancient carvings made into wooden doors or onto stone walls. These were normally letters of the Regional language, arranged into a specific Prayer or common ''Good Luck'' phrase of The Era. Said to have derived from the ancient practice of early Christians and ''secretive'' Groups who left hidden or not commonly recognized ''messages'' to others of their beliefs or membership, Sator Squares were also associated with various ''magical'' Incantations. These were placed on doorways and walls as well – as a means of ''protecting a dwelling'' from Evil or Spirits. The practice greatly decreased with the wide scale adoption of Christianity in many Countries.