Original sentence: He may have been born in Hamburg, where his father Gerhard Schlüter was from, but it is certain that he received training in Danzig (Gdańsk), and may have been born there; another Andreas Schlüter died in Danzig in 1664
Edited sentence: He may have been born in Hamburg, where his father Gerhard Schlüter was from, but it is certain that he received training in Danzig (Gdańsk) in Royal Prussia, Poland, and may have been born there; another Andreas Schlüter died in Danzig in 1664