The retour des cendres (literally "return of the ashes", though "ashes" is used here as a metaphor for his mortal remains, as he was not cremated) was the return of the mortal remains of Napoleon I of France from the island of Saint Helena to France and the burial in Hôtel des Invalides in Paris in 1840, on the initiative of Prime Minister Adolphe Thiers and King Louis Philippe I.

Background

After his defeat in the War of the Sixth Coalition in 1814, Napoleon abdicated as Emperor of the French, and was exiled to the Mediterranean island of Elba. The following year he returned to France and took up the throne once more, beginning the Hundred Days. The Coalition powers which had prevailed against him the previous year mobilised against him, and defeated the French in the Battle of Waterloo. Napoleon returned to Paris and abdicated on 22June 1815. Foiled in his attempt to sail to the United States, he gave himself up to the British, who exiled him to the remote island of St Helena in the South Atlantic. He died and was buried there in 1821.

Previous attempts In a codicil to his will, written in exile at Longwood House on St Helena on 16April 1821, Napoleon had expressed a wish to be buried "on the banks of the Seine, in the midst of the French people [whom I] loved so much". On the emperor's death, General Henri Bertrand unsuccessfully petitioned the British government to let Napoleon's wish be granted. He then petitioned the ministers of the newly restored King Louis XVIII of France, from whom he did not receive an absolute refusal. Instead, the explanation given was that the arrival of the remains in France would undoubtedly be the cause or pretext for political unrest that the government would be wise to prevent or avoid, but that his request would be granted as soon as the situation had calmed and it was safe enough to do so.

Course Political discussions Early days After the July Revolution, a petition demanding the remains' reburial in the base of the Colonne Vendôme (on the model of Trajan's ashes, buried in the base of his column in Rome) was refused by the Chamber of Deputies on 2 October 1830. Ten years later, Adolphe Thiers, the new President of the Council (prime minister) under King Louis Philippe I and a historian of the French Consulate and First French Empire, dreamed of the return of the remains as a grand political coup de théâtre which would definitively achieve the rehabilitation of the Revolutionary and Imperial periods on which he was engaged in his Histoire de la Révolution française and Histoire du Consulat et de l'Empire. He also hoped to flatter the left's dreams of glory and restore the reputation of the July Monarchy (whose diplomatic relations with the rest of Europe were then under threat from its problems in Egypt, arising from its support for Muhammad Ali).

It was, nonetheless, Louis Philippe's policy to try to regain "all the glories of France", to which he had dedicated the Château de Versailles, turning it into a museum of French history. Yet he was still reluctant and had to be convinced to support the project against his own doubts. Among the rest of the royal family, the Prince de Joinville did not want to be employed on a job suitable for a "carter" or an "undertaker"; Queen Maria Amalia adjudged that such an operation would be "fodder for hot-heads"; and their daughter Louise saw it as "pure theatre". In early 1840, the government led by Thiers appointed a twelve-member committee () to decide on the location and outline of the funerary monument and select its architect. The committee was chaired by politician Charles de Rémusat and included writers and artists such as Théophile Gautier, David d'Angers, and Jean-Auguste-Dominique Ingres.

On 10 May 1840, François Guizot, then French ambassador in London, against his own will submitted an official request to the British government, which was immediately approved according to the promise made in 1822. For his part, the British Foreign Secretary (later Prime Minister) Lord Palmerston privately found the idea nonsensical and wrote about it to his brother, presenting it in the following terms: "Here's a really French idea".

12 May On 12 May, during discussion of a bill on sugars, French Interior Minister Charles de Rémusat mounted the rostrum at the Chamber of Deputies and said:

The minister then introduced a bill to authorise "funding of 1million [francs] for translation of the Emperor Napoleon's mortal remains to the Église des Invalides and for construction of his tomb". This announcement caused a sensation. A heated discussion began in the press, raising all sorts of objections as to the theory and to the practicalities. The town of Saint-Denis petitioned on 17May that he instead be buried at their basilica, the traditional burial place of French kings.

25–26 May On 25 and 26 May, the bill was discussed in the Chamber. It was proposed by Bertrand Clauzel, an old soldier of the First French Empire who had been recalled by the July Monarchy and promoted to Marshal of France. In the name of the he endorsed the choice of Les Invalides as the burial site, not without discussing the other suggested solutions (besides Saint-Denis, the Arc de Triomphe, the Colonne Vendôme, the Panthéon de Paris, and even the Madeleine had been suggested to him). He proposed that the funding be raised to 2million, that the ship bringing the remains back be escorted by a whole naval squadron and that Napoleon would be the last person to be buried in the Invalides. Speeches were made by republican critic of the Empire Glais-Bizoin, who stated that "Bonapartist ideas are one of the open wounds of our time; they represent that which is most disastrous for the emancipation of peoples, the most contrary to the independence of the human spirit." The proposal was defended by Odilon Barrot (the future president of Napoleon III's council in 1848), whilst the hottest opponent of it was Alphonse de Lamartine, who found the measure dangerous. Lamartine stated before the debate that "Napoleon's ashes are not yet extinguished, and we're breathing in their sparks". Before the sitting, Thiers tried to dissuade Lamartine from intervening but received the reply "No, Napoleon's imitators must be discouraged." Thiers replied "Oh! But who could think to imitate him today?", only to receive Lamartine's reply that then spread right round Paris – "I do beg your pardon, I meant to say Napoleon's parodists." During the debate Lamartine stated:

In conclusion, Lamartine invited France to show that "she [did not wish] to create out of this ash war, tyranny, legitimate monarchs, pretenders, or even imitators". Hearing this peroration, which was implicitly directed against him, Thiers looked devastated on his bench. Even so, the Chamber was largely favourable and voted through the measures requested, although by 280votes to 65 it did refuse to raise the funding from 1to 2million. The Napoleonic myth was already fully developed and only needed to be crowned. The July Monarchy's official poet Casimir Delavigne wrote: France, you have seen him again! Your cry of joy, O France, Drowns out the noise of your cannon; Your people, a whole people reaching out from your riverbanks, Holds out its arms to Napoleon.

4–6 June On 4 or 6 June, Bertrand was received by Louis Philippe, who gave him the Emperor's arms, which were placed in the treasury. Bertrand stated on this occasion:

Louis Philippe replied, with studied formality:

This ceremony angered Joseph and Louis-Napoléon Bonaparte, the latter writing in The Times:

After the arms ceremony, Bertrand went to the Hôtel de Ville and offered to the president of the Municipal Council the council chair that Napoleon had left to the capital – it is now in the Musée Carnavalet.

Arrival at Saint Helena

At 7 pm on 7 July 1840, the frigate Belle Poule left Toulon, escorted by the corvette Favourite. The Prince of Joinville, the king's third son and a career naval officer, was in command of the frigate and the expedition as a whole. Also on board the frigate were Philippe de Rohan-Chabot, an attaché to the French ambassador to the United Kingdom and commissioned by Thiers (wishing to gain reflected glory from any possible part of the expedition) to superintend the exhumation operations; generals Bertrand and Gaspard Gourgaud; Count Emmanuel de Las Cases (député for Finistère and son of Emmanuel de Las Cases, the author of Le Mémorial de Sainte-Hélène); and five people who had been domestic servants to Napoleon on Saint Helena (Saint-Denis – better known by the name Ali Le Mameluck – Noverraz, Pierron, Archambault, and Coursot). Captain Guyet was in command of the corvette, which transported Louis Marchand, Napoleon's chief valet de chambre, who had been with him on Saint Helena. Others on the expedition included Abbé Félix Coquereau (fleet almoner); Charner (Joinville's lieutenant and second in command), Hernoux (Joinville's aide-de-camp), Lieutenant Touchard (Joinville's orderly), Bertrand's young son Arthur, and ship's doctor Rémy Guillard. Once the bill had been passed, the frigate was adapted to receive Napoleon's coffin: a candlelit chapel was built in the steerage, draped in black velvet embroidered with the Napoleonic symbol of silver bees, with a catafalque at the centre guarded by four gilded wooden eagles.

The voyage lasted 93 days and, due to the youth of some of its crews, turned into a tourist trip, with the Prince dropping anchor at Cádiz for four days, Madeira for two days, and Tenerife for four days, while 15 days of balls and festivities were held at Bahia, Brazil. The two ships finally reached Saint Helena on 8 October and in the roadstead found the French brig Oreste, commanded by Doret, who had been one of the ensigns who had come up with a daring plan at île-d'Aix to get Napoleon away on a lugger after Waterloo and who would later become a capitaine de corvette. Doret had arrived at Saint Helena to pay his last respects to Napoleon but he also brought worrying news – the Egyptian incident, combined with Thiers' aggressive policy, were very close to causing a diplomatic rupture between France and the UK. Joinville knew that the ceremony would be respected but began to fear he would be intercepted by British ships on the return trip.