Erected by Pope Pius XI on 24 April 1922 as an apostolic administration. On 30 December 1925, erected as a diocese directly subordinate to the Holy See. Erected an archdiocese on 25 March 1992 by Pope John Paul II by the bull Totus Tuus Poloniae populus. The metropolitan see is Gdańsk with the Archdiocesan Cathedral of the Holy Trinity in Gdańsk-Oliwa and the Co-Cathedral of Assumption of the Blessed Virgin Mary in Gdańsk (Marian Basilica). The patron saint of the archdiocese is St. Wojciech/Adalbert, bishop and martyr.