Career
With permission from the Estates, the castle and lordship of Frankenstein were reserved for Margarete as her Wittum. After four years of childless marriage, John died and Margarete"s stepson Charles Christopher sold off Frankenstein. This caused a dispute between Margarate and Charles Christopher and his heirs, which was settled on 25 April 1577 by the intervention of Emperor Rudolf II in his capacity as King of Bohemia.
In the meantime, Margarete had returned to Brunswick.
She died on 28 October 1580 in Stauffenburg.