Calas, along with his wife, was a Protestant. France was then a Catholic country; Catholicism was the state religion, with no legal right for individuals to practice different faiths. While the harsh oppression of Protestantism initiated by King Louis XIV had largely receded, Protestants were, at best, tolerated. Louis, one of the Calas's sons, converted to Catholicism in 1756.
Death of Marc-Antoine Calas
On 13–14 October 1761, another of the Calas sons, Marc-Antoine, was found deadon the ground floor of the family's home. Rumors had it that Jean Calas had killed his son because he intended to convert to Catholicism. When interrogated, the family initially claimed that Marc-Antoine had been killed by a murderer. Then they declared that they had found Marc-Antoine dead, hanged; because suicide was considered a heinous crime against oneself, and the dead bodies of suicides were defiled, they had arranged for their son's suicide to look like a murder.
Trial and execution
Despite Jean Calas claiming that the death was a suicide, and the testimony of Jeanne Vigneire, Calas' Catholic governess, the court in Toulouse held that Jean Calas had murdered his son. Calas was also sentenced to be tortured after being judged and found guilty. His arms and legs were stretched until they pulled out of their sockets. Thirty pints of water were poured down his throat. He was tied to a cross in the cathedral square where each of his limbs were broken twice by an iron bar. Even with all this torture, he continued to declare his innocence. On March 9, 1762 the parlement of Toulouse sentenced Jean Calas to death on the wheel. On March 10, at the age of 64, he died tortured on the wheel, while still firmly claiming his innocence.
Voltaire's intervention and posthumous exoneration
French philosopherVoltaire was contacted about the case, and after initial suspicions that Calas was guilty of anti-Catholic fanaticism were dispelled by his allegations, he began a campaign to get Calas' sentence overturned, claiming that Marc-Antoine had committed suicide because of gambling debts and not being able to finish his university studies due to his denomination. Voltaire's efforts were successful, and King Louis XV received the family and had the sentence annulled in 1764. The king fired the chief magistrate of Toulouse, the Capitoul, the trial was done over, and in 1765 Jean Calas posthumously was exonerated on a "vice de procedure", not on the original charges, with the family paid 36,000 livres by the king in compensation. Voltaire, an outspoken critic of the Catholic church, cited the instance as an example of the church's severity in his 1763 work Treatise on Tolerance.
