The OP's place of residence has no bearing upon the topic of this thread. You need to stop trying to take thread's off-topic Delphiandomine or you will be suspended again.
This formula has appeared over their doorways of milions of Polish flats, as Poles inscribe the presumed names of the Three Kings with chalk blessed in church on the Epiphany.
Actually, "millions" is a bit of an overstatement. You'll rarely see it in modern developments, and in older developments, those with their own doors (rather than the original) tend to shun it as well. I'm thinking of several of my neighbours - my flat was built in the 80's, and you'll only find this chalked on the "old" doors.
To someone who has actually been in Poland at all (ie, not you Polonius/Des) - have you ever seen this chalked on a "new" flat door?
Such piousd practices including the opłatek sharing, blessing of Easter baskets and blessing of newlweds-to-be by their parents before heading for church are enriching, heart-warming touches that set Poland apart from re-zoologised socieities wallowing in sterile, secularist, materialist scum.
Opłatek sharing has little to do with religion these days in Poland - it's becoming a secular tradition very quickly.
As for the final part of your post - why don't you live in Poland, rather than living in a country full of "sterile, secularist, materialist scum"?
(incidentally - Poles are as materialist as they come. You have
seen the mass of disgustingly garish big houses in the Polish countryside, right?)