Archcathedral Basilica of the Assumption of the Blessed Virgin Mary and St. Andrew, Frombork

The Archcathedral Basilica of the Assumption of the Blessed Virgin Mary and Saint Andrew (Polish: Bazylika archikatedralna Wniebowzięcia Najświętszej Maryi Panny i św. Andrzeja we Fromborku) in Frombork, Poland, is a Roman Catholic church located at the Cathedral Hill, by the Cathedral St. (ul. Katedralna 8) It was originally constructed from 1329 to 1388.

The basilica is one of Poland's official national Historic Monuments (Pomnik historii), as designated September 16, 1994 and tracked by the National Heritage Board of Poland.