Otherwise the inheritance on his death would probably pass to Protestant princes.
The first wife provided for him was a beautiful princess; Jacobea of Baden.

The Pope blessed the nuptials, and sent the bride a golden rose, but the union was sterile and unhappy.

The Duke, who was in the habit of careering through his palace in full armour, slashing at and wounding anyone that came in his way, was at last locked up.

The hapless Jacobea, accused by Sibylla of witchcraft and other crimes possible and impossible, was thrown into prison.

Two years long the devilish malignity of the sister-in-law was exercised upon her victim, who, as it is related, was not allowed natural sleep during all that period, being at every hour awakened by command of Sibylla.