Ercole Grimaldi, Marquis of Baux (16 December 1623 – 2 August 1651) was a member of the House of Grimaldi. He was the first Monegasque prince and heir apparent to the first Monegasque sovereign prince, Honoré II. Dying at the age of 27, Baux was replaced as heir apparent by his son Louis who succeeded Honoré II.
Baux and his wife and their children went to visit the convent of Carnoles in Mentone. After the visit was over Baux relaxed in the gardens by shooting targets with some guards.[3] Anxious to see how a weapon worked, Baux insisted that a guard show it to him. Improperly handling the gun, the guard accidentally shot it towards Baux and the other guards, two of whom were also injured. Baux received a gunshot wound to the spine and, however good medical care he received, he died the next day on 1 August 1651, at the age of 27.[3] It is said that despite his wound, he insisted over and over again, as he lay on his deathbed, that the guard who shot him should not be punished as it had been an accident. Nonetheless, the man was imprisoned for a time and even tried to kill himself. After his release he never returned to Monaco.[3] Afterwards, there were reports that a local monk had predicted Baux's death and that Baux himself had seen a ghost who had told him to enjoy life for he would not be able to in a short time.[3]