After the unification process of 1918, in the former Hungarian State schools Romanian language was introduced as a teaching language. Consequently, the Hungarian as a teaching language was solely preserved in the vocational schools. The governments showed little understanding toward the minorities' vocational schools, aiming rather at the unification of the scholar system. The Roman Catholic Church sustained and administrated hundreds of elementary and secondary schools, many of them having a multi-secular history. Based on the documents from the churches' archives, this study presents the efforts of the Roman Catholic Church to preserve and maintain all these schools.