Maria was executed in 1557 by the Spanish Inquisition. She was accused of heresy and witchcraft, and her trial was a public spectacle. Maria was tortured and forced to confess to her crimes, and she was then burned at the stake. Her death was a reminder to the people of Spain that the Inquisition was a powerful force that could not be trifled with.
The Enigmatic Life of Grand Duchess Maria Nikolaevna: Unraveling the Secrets of a Russian Princess