Letter of the Holy Father to the special envoy to the celebration for the centenary of the Archdiocese of Łódź (Poland) [12 December 2020] (26 November 2020)
Letter of the Holy Father Francis to the Reverend Fr Dariusz Wilk, CSMA, Superior General of the Congregation of St. Michael the Archangel (Michaelites) (29 July 2020)