Our mission, Business Owners - Advertise to Catholics Today . As a Ruthenian sub-group, Carpatho-Rusyns hail from Carpathian Ruthenia, an area that before World War I was under the dominions of Great Moravia, Kievan Rus, Halych-Volhynia, and Ottoman/Royal-Imperial Hungary. Saint Mary's Byzantine Catholic Church. please enable browser's Javascript to use the Email Form tool. The birth certificate detail we have shows a reference to the Russian orthodox Greek Catholic Church 14 street. Go to document.write('