[1] Magdalena was betrothed to Ladislaus the Posthumous, but he died suddenly in Prague on 23 November 1457 while preparing for his marriage.

It was rumored at the time that his political opponents in Bohemia had poisoned him; but in the 20th century it was proved that Ladislaus died of leukemia, not a recognized disease in that period.

During this regency, she was forced to battle her brother-in-law, John of Foix, who claimed the throne of Navarre as heir of Francis Phoebus.

It is possible that the consummation, being a political event, was purposely postponed in order to prevent Catherine and her husband from being declared of legal majority, which would allow Magdalena to continue her regency.

[3] Magdalena continued to act as regent despite the fact that her daughter had given birth in 1491 and her marriage had clearly been consummated and, at the age of twenty-three, should no longer have the need of a minor regency.