Schloss Marienburghttps://www.visit-hannover.com/en/en/view/content/351178/full/1/5706641999-03-02T00:00:00+01:00Marienburg CastleMax Mustermannmax@mustermann.dehttps://www.visit-hannover.com/en/en/view/content/351178/full/1/5706641999-03-02T00:00:00+01:00 The authentically preserved summer residence of the Guelphs, the oldest princely house in Europe, is one of the most important neo-Gothic monuments in Germany.