Its Archcathedral Basilica of The Holy Trinity, Blessed Virgin Mary and St Bernard in Gdańsk is listed as a Historic Monument of Poland.

[2] While about 130,000 people in Danzig were Catholic, only about 10 percent of them were Polish-speaking and the first attempts to reorganize the ecclesiastical allocation were made in spring 1919, when members of the German congregation asked for an affiliation to the Diocese of Warmia.

In 1925 a concordat between Poland and the Holy See was signed and the Apostolic Administrator was now supposed to be subordinated to the Nuncio of Warsaw, which caused protests among the local populace.

Thus the Pope established the exempt Diocese of Danzig on 30 December 1925 and appointed Edward O'Rourke as the first Bishop on 2 January 1926.

[5] On 13 August 2020, Pope Francis removed Gdańsk Archbishop Sławoj Leszek Głódź, who was among those who covered up abuse committed by Jankowski and Cybula.