The regional capital was Marienwerder in West Prussia ( now Kwidzyn ) .
The Marienwerder Region ( Regierungsbezirk Marienwerder ) was a government region ( Regierungsbezirk ) , of Prussia from 1815 until 1945 .
The regional capital was Regierungsbezirk Marienwerder in Prussia   ( now Kwidzyn ) .
The Marienwerder Region ( Regierungsbezirk Marienwerder ) was a government region ( Regierungsbezirk ) , of Prussia from 1815 until 1945 .