Archdiocese of Białystok

As of 1962 it was an apostolic administration (Archdiocese of Białystok), covering the territory of the Archdiocese of Vilnius within the national borders of Poland after World War II. Erected a diocese on 5 June 1991, during Pope John Paul II’s visit to Białystok. Erected an archdiocese on 25 March 1992 by Pope John Paul II by the bull Totus Tuus Poloniae populus.