Catherine Elisabeth of Brunswick-Lüneburg was Duchess consort of Schleswig and Countess consort of Holstein-Rendsburg.
Background
She was a daughter of Magnus II, Duke of Brunswick-Lüneburg and Catherine of Anhalt-Bernburg, daughter of Bernhard III, Prince of Anhalt-Bernburg. Through her mother, she was the great-great granddaughter of King Abel of Denmark.
Career
She would also become the grandmother of Christian I of Denmark. In the 14th century, it was still rare to have two first names such as "Catherine Elisabeth". Due to this confusion, however, she has sometimes been referred to by both names.
In the following years, Queen Margaret acquired large parts of Schleswig as security (Tønder fief, Frisland, episcopal manors in Svabsted and Stubbe) and by purchase (Trøjborg, Skinkelborg and Grødersby).
King Erik took over Haderslev fief as security from the fiefholder Helene Ahlefeldt, and the queen, Flensborg. However, in 1408, when Gottorp was about to be taken over by the Danish crown, Catherine Elisabeth called her son Henry back from Denmark and had a declaration of hostility sent to King Erik on 14 June 1410.
This led to a number of feuds, instability and the pawning of several fiefs. Her own dower lands of Als, Ærø and Sundeved were taken by King Erik.
In 1417, she was present in Rendsborg at her son"s side when King Erik took Schleswig and Henry was forced to seek help from Hamburg.
This is the last time she is mentioned.
