The Marienwerder Region was part of the Province of West Prussia from 1815 -- 1829 , and again 1878 -- 1920 , belonging to the Province of Prussia in the intervening years .
The regional capital was Marienwerder in West Prussia ( now Kwidzyn ) .
The Marienwerder Region was part of the West Prussia       from 1815 -- 1829 , and again 1878 -- 1920 , belonging to the Province of Prussia in the intervening years .
The regional capital was Marienwerder in West Prussia ( now Kwidzyn ) .