As I said above it is better to be radical than a syncretist. Hopefully, in the next couple of years we Roman Catholics will return to our traditional understanding of the Orthodox world. All of this syncretism which has gone on in the last 50 years is enough.
No, this place has never had an Orthodox minority, for it is too far West.
Really, this looks rather Eastern, despite the damage done by repainting after the Hussites desecrated her. Where do the Poles say they got her from again?

http://en.wikipedia.org/wiki/Orthodox_Church_of_the_Icon_of_Our_Lady_of_Cz%C4%99stochowaSee? not too far West. Btw, Orthodox monks from Egypt went to Ireland, so you are not too far West at all.
St. Photios sent SS. Cyril and Methodios to St. Rastislav,

who evangelized Rastislav's subjects in their own Slavonic language, in his realm:

Looks West of Poland.
St. Methodosius on his death bed designated his disciple St. Gorazd, a local nobleman, as his successor.
http://www.omda.bg/ENGL/HISTORY/sedmotch.htmlThe Vatican, however, let the Germans suppressed the Slavonic rite. St. Gorazd, however, remained. It seems that he founded the episcopate at Cracow.