Background
She was the eldest child and eldest daughter of Dietrich the Wise, Margrave of Landsberg, by his wife Helena, daughter of John I, Margrave of Brandenburg.
She was the eldest child and eldest daughter of Dietrich the Wise, Margrave of Landsberg, by his wife Helena, daughter of John I, Margrave of Brandenburg.
This action was made in order to pay the expenses incurred in connection of the marriage celebrated between Conradin and Sophie, who took place by the end of October and early September of that year, possibly in the city of Bamberg or Nürnberg. The union was celebrated by proxy (desponsatio per procuratinem), because the fourteen-years-old King was absent at that moment. In his place, Duke Louis II stood as groom and signed the marriage contract.
The validity of Conradin and Sophie"s marriage is still disputed by the historians.
However, others historians supported the idea that Sophie and Conradin were, in fact, legally married, because the contract signed by Louis II was, clearly, a marriage by proxy with all the legal obligations. In 1271, the twelve-years-old Sophie married with Konrad I, Duke of Glogów, an almost forty-years-old widower.
They had no children. After Konrad I"s death in 1274, Sophie returned to her homeland and became a nun in the monastery of Street.Clara in Weissenfels, where she later was elected Abbess.
Sophie held this post until her death.
Conradin never seen his bride: soon after the marriage, he departed with his friend Frederick I of Baden to Italy with the purpose to recover his rights over Frederick II"s inheritance, and two years later, on 29 October 1268, the last legitimate male member of the House of Hohenstaufen was beheaded in the Piazza del Mercato of Naples.