Oliwa, Gdańsk Archcathedral is a church in Oliwa, Gdańsk, Poland that is dedicated to the Holy Trinity. Also known as the Archcathedral Basilica of the Holy Trinity in Oliwa, Gdańsk.

Oliwa is a northern district of the city of Gdańsk, Poland. From east it borders Przymorze and Żabianka, from the north Sopot and from the south with the districts of Strzyża, VII Dwór and Brętowo, while from the west with Matarnia and Osowa. It is known for its medieval monastery with the Oliwa Cathedral, the 1627 Battle of Oliwa and the 1660 Treaty of Oliva.