Carl Maria Splett was a German Roman Catholic priest and Bishop of Danzig (Gdańsk); his role during World War II, especially as apostolic administrator of the Diocese of Culm, is controversial. After World War II he was put on trial and imprisoned in Poland for his alleged collaboration with the Nazi regime, and later deported to West Germany.

The Archdiocese of Gdańsk is a Latin Church ecclesiastical jurisdiction or archdiocese of the Catholic Church in Poland. The diocese's episcopal see is Gdańsk.