This is the famous “SATOR AREPO” square, thought to have had magical talisman power by people all over the Ancient Roman world. It works as a palindrome in so many ways it is called a “2D” palindrome. It was eventually used by early Christians, who scrambled up the letters to make it spell “Pater Noster” (Latin for “Our Father”) with the “A”and “O” leftover standing for the Greek Alpha and Omega.
