Okay, having googled it, I now know what it is. But I'm still hazy as to what you're asking. This is the wikipedia page on it, in case you hadn't already searched there.
Mighty clever I suppose. I'm not overly supersitious but it seems sort of special in a way. I was just wondering if you knew anything about it that wasn't on wikipedia.
Personally, I think all of the superstition is crap. It's a fairly impressive arangement of letters, but last I checked, that didn't mean something had magical powers. And no, I didn't know what it was until I wiki-ed it.
With all the permutaions of letters in language, is it really so strange that someone eventually stumbled upon such a perfect puzzle phrase?? Of course, having found it, people must assume there is a cosmic significance...
It seems as if it was in a Christian Church or something like that, so anyone could have made it, as long as they believe in God, they could make a Sator Square, so someone could as easily make a Satan Square if they really wanted to, so i guess it has no significance, just shows the belief of a man/woman