In particular, this is a square two-dimensional palindrome, and admits... - dofaq.co
sator square

In particular, this is a square two-dimensional palindrome, and admits...

 wikipedia - 08 Sep 2020
In particular, this is a square two-dimensional palindrome, and admits four symmetries (its symmetry group is the Klein four-group rather than the dihedral group of order 8 since adjacent sides of the square are not the same): identity, two diagonal reflections, and 180-degree rotation. As can be seen, the text may be read top-to-bottom, bottom-to-top, left-to-right, or right-to-left; and it may be rotated 180 degrees and still be read in all those ways.

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