Francis III, Duke of Brittany - Death

Death

The Dauphin Francis died at Château Tournon-sur-Rhône on 10 August 1536, at the age of eighteen. The circumstances of his death seemed suspicious, and it is believed by many that he was poisoned. However, there is ample evidence that he died of natural causes, possibly tuberculosis. The Dauphin had never fully recovered his health from the years spent in damp, dank cells in Madrid.

After playing a round of tennis at a jeu de paume court "pré d'Ainay", the Dauphin asked for a cup of water, which was brought to him by his secretary, Count Montecuccoli. After drinking it, Francis collapsed and died several days later. Montecuccoli, who was brought to the court by Catherine de' Medici, was accused of being in the pay of Charles V, and when his quarters were searched a book on different types of poison was found. Catherine de' Medici was well known to have an interest in poisons and the occult. Under torture, Montecuccoli confessed to poisoning the Dauphin.

In an age before forensic science, poison was usually suspected whenever a young, healthy person died shortly after eating or drinking. There was no way to pinpoint and trace the substance after death; therefore, it was considered a quick, easy and non-traceable form of homicide. There have been several other suspected cases of political-murder-by-poison in the French royal family through the ages. It is suspected that the Dauphin's younger brother, Charles may have been poisoned.