My great grandfather Fedor Laske was born in Langenbruck, Preussen, now Prudnik, Opole, Poland. He was Catholic. I have written to the Catholic parish in Opole at:
Diocese of Opole
Diecezja Opolska
ul. Ksiazat Opolskich 19
Opole, 45-005 Poland
I have not gotten an answer yet, but I hope this helps someone else looking in this area.