The Sator Square is the earliest dateable 2D palindrome. It was found in the ruins of Pompeii.
the most known sator square reads:
Sator
Arepo
Tenet
Opera
Rotas
but this version from 1770 - 1808 reads:
Sator
Arepo
Teret
Opera
Rotas
Remember to check our size guide for measurements.