Imprisonment, execution and burial (1792–1793)
Louis was officially arrested on 13 August 1792 and sent to the Temple, an ancient fortress in Paris that was used as a prison. On 21 September, the National Assembly declared France to be a republic, and abolished the monarchy. Louis was stripped of all of his titles and honors, and from this date was known as Citoyen Louis Capet.
The Girondins were partial to keeping the deposed king under arrest, both as a hostage and a guarantee for the future. Members of the Commune and the most radical deputies, who would soon form the group known as the Mountain, argued for Louis's immediate execution. The legal background of many of the deputies made it difficult for a great number of them to accept an execution without the due process of law, and it was voted that the deposed monarch be tried before the National Convention, the organ that housed the representatives of the sovereign people. In many ways, the former king's trial represented the trial of the monarchy by the Revolution. It was seen as if with the death of one came the life of the other. The historian Jules Michelet later argued that the death of the former king led to the acceptance of violence as a tool for happiness. He said, "If we accept the proposition that one person can be sacrificed for the happiness of the many, it will soon be demonstrated that two or three or more could also be sacrificed for the happiness of the many. Little by little, we will find reasons for sacrificing the many for the happiness of the many, and we will think it was a bargain."
Two events led up to the trial for Louis XVI. First, after the Battle of Valmy on 22 September 1792, General Dumouriez negotiated with the Prussians who evacuated France. Louis could no longer be considered a hostage or as leverage in negotiations with the invading forces. Second, in November 1792, the armoire de fer (iron chest) incident took place at the Tuileries Palace, when the existence of the hidden safe in the king's bedroom containing compromising documents and correspondence, was revealed by François Gamain, the Versailles locksmith who had installed it. Gamain went to Paris on 20 November and told Jean-Marie Roland, Girondin Minister of the Interior, who ordered it opened. The resulting scandal served to discredit the King. Following these two events the Girondins could no longer keep the King from trial.
On 11 December, among crowded and silent streets, the deposed king was brought from the Temple to stand before the National Convention and hear his indictment, an accusation of high treason and crimes against the State. On 26 December, his counsel, Raymond Desèze, delivered Louis's response to the charges, with the assistance of François Tronchet and Guillaume-Chrétien de Lamoignon de Malesherbes. Before the trial started and Louis mounted his defense to the convention, he told his lawyers that he knew he would be found guilty and be killed, but to prepare and act as though they could win. He was resigned to and accepted his fate before the verdict was determined, but he was willing to fight to be remembered as a good king for his people.
The convention would be voting on three questions: first, is Louis guilty; second, whatever the decision, should there be an appeal to the people; and third, if found guilty, what punishment should Louis suffer? The order of the voting on each question was a compromise within the Jacobin movement between the Girondins and the Mountain; neither were satisfied but both accepted.
On 15 January 1793, the convention, composed of 721 deputies, voted on the verdict. Given the overwhelming evidence of Louis's collusion with the invaders, the verdict was a foregone conclusion – with 693 deputies voting guilty, none for acquittal, with 23 abstaining. The next day, a roll-call vote was carried out to decide upon the fate of the former king, and the result was uncomfortably close for such a dramatic decision. 288 of the deputies voted against death and for some other alternative, mainly some means of imprisonment or exile. 72 of the deputies voted for the death penalty, but subject to several delaying conditions and reservations. The voting took a total of 36 hours. 361 of the deputies voted for Louis's immediate execution. Louis was condemned to death by a majority of one vote. Philippe Égalité, formerly the Duke of Orléans and Louis's cousin, voted for Louis's execution, a cause of much future bitterness among French monarchists; he would himself be guillotined on the same scaffold, Place de la Révolution, before the end of the same year, on 6 November 1793.
The next day, a motion to grant Louis XVI reprieve from the death sentence was voted down: 310 of the deputies requested mercy, but 380 voted for the immediate execution of the death penalty. This decision would be final. Malesherbes wanted to break the news to Louis and bitterly lamented the verdict, but Louis told him he would see him again in a happier life and he would regret leaving a friend like Malesherbes behind. The last thing Louis said to him was that he needed to control his tears because all eyes would be upon him.
On 21 January 1793, Louis XVI, at age 38, was beheaded by a guillotine on the Place de la Révolution. As Louis XVI mounted the scaffold, he appeared dignified and resigned. He delivered a short speech in which he pardoned "...those who are the cause of my death.... ". He then declared himself innocent of the crimes of which he was accused, praying that his blood would not fall back on France. Many accounts suggest Louis XVI's desire to say more, but Antoine Joseph Santerre, a general in the National Guard, halted the speech by ordering a drum roll. The former king was then quickly beheaded. Some accounts of Louis's beheading indicate that the blade did not sever his neck entirely the first time. There are also accounts of a blood-curdling scream issuing from Louis after the blade fell but this is unlikely, since the blade severed Louis's spine. The executioner, Charles-Henri Sanson, testified that the former king had bravely met his fate.
Immediately after his execution, Louis XVI's corpse was transported in a cart to the nearby Madeleine cemetery, located on rue d'Anjou, where those guillotined at the Place de la Révolution were buried in mass graves. Before his burial, a short religious service was held in the Madeleine church (destroyed in 1799) by two priests who had sworn allegiance to the Civil Constitution of the Clergy. Afterward, Louis XVI, his severed head placed between his feet, was buried in an unmarked grave, with quicklime spread over his body. The Madeleine cemetery was closed in 1794. In 1815, Louis XVIII had the remains of his brother Louis XVI and of his sister-in-law Marie Antoinette transferred and buried in the Basilica of St Denis, the Royal necropolis of the Kings and Queens of France. Between 1816 and 1826, a commemorative monument, the Chapelle expiatoire, was erected at the location of the former cemetery and church.
As Louis's blood dripped onto the ground, several onlookers ran forward to dip their handkerchiefs in it. This account was proven true in 2012 after a DNA comparison linked blood thought to be from Louis XVI's beheading to DNA taken from tissue samples originating from what was long thought to be the mummified head of his ancestor, Henry IV of France. The blood sample was taken from a squash gourd carved to commemorate the heroes of the French Revolution that had, according to legend, been used to house one of the handkerchiefs dipped in Louis's blood.
