Career
She was considered extraordinarily beautiful, intelligent and eloquent, but in addition also as a domineering, unforgiving, unrepentant and wasteful. Her reign was marked by disputes within East Frisia. Historians have a negative view of her overall performance, which may be due to her conflicts with the Estates.
The brief marriage produced two short-living daughters during the Prince"s lifetime: Eberhardine Katharina (25 May 1663 - 10 July 1664) and Juliane Charlotte (3 January 1664 - 3 June 1666).
As the mother of the new-born prince, she became is guardian and regent of East Frisia. She tried to rule as an absolutist princess, which led to a series of conflict with the equally self-conscious Estates of East Frisia and borugh the country to the brink of civil war several times.
In the end, her efforts failed when the Emperor confirmed the Estates and declared her son of age. Her major foreign policy success was a border treaty with Oldenburg on 22 December 1666.
This treaty created the so-called Golden line, which separates East Frisia from Oldenburg Friesland to this day.