Diocese of Włocławek

Erected ca. 1123 (in lieu of the Diocese of Kruszwica). Initially called the Diocese of Kujawy or Kujawy-Pomorze. On 30 June 1818, Pope Pius VII named it the Diocese of Kujawy-Kalisz, and Pope Pius XI on 28 October 1925 named it the Diocese of Włocławek. Pope John Paul II introduced territorial changes on 25 March 1992 and 24 February 2004.