The ‘Sator Square’ is the world’s oldest 2D palindrome. Found in the ruins of Pompeii, it was believed to have magic powers because it contains 5 connected palindromes. Each of the Latin words, SATOR, AREPO, TENET, OPERA, and ROTAS, can be read bottom to top, top to bottom, left to right, and right to left. Source Source 2 Source 3