Glücksburg Castle is one of the most significant Renaissance castles in Northern Europe.
Christianspris or Frederiksort was a Danish fortification somewhat north of the then Danish city of Kiel.
Glambæk was a castle in Femern on the north-east coast of Schleswig-Holstein in what is now Germany.
Kiel Castle in Kiel in the north German state of Schleswig-Holstein was one of the secondary residences of the Gottorf dukes.
Plön Castle in Plön is one of the largest castles in the north German state of Schleswig-Holstein and the only one located on a hill.
Glücksburg Castle is a water castle, on the Flensburg Fjord in the town of Glücksburg, Germany.
Schloss Ahrensburg is a former Herrenhaus and is today referred to as a Schloss.
