Complex sentence: When he died in 1759, Elisabeth Stierncrona retired to the estate Uttersberg and was left with great debts which the estate could not repay, while trying to save her own dowry and the inheritance of her children.
Split into simpler sentences: When he died in 1759, Elisabeth Stierncrona retired to the estate Uttersberg and was left with great debts which the estate could not repay. She tried to save her own dowry and the inheritance of her children.