Polish coat of arms and hereldery are influenced by the old pagan symbols of the sarmation tribes of Ukraine and south east poland. While the polish population is Slavic, the polish nobility held the belief that they were descendants of sarmations. Thus they Christianized much of these old pagan symbols of the sarmation occult.
There's an academic at UAM in Poznan who published an interesting paper saying that some of them can be read by people familiar with Old Persian.
Nothing especially Christianised about the symbols though; they have no special significance in that religion.