royal family. The Brunswick Manifesto, issued on 25 July 1792, triggered the events of 10 August when the approach of an armed mob on its way to the Tuileries Palace forced the royal family to seek refuge at the Legislative Assembly. Ninety minutes later, the palace was invaded by the mob, who massacred the Swiss Guards. On 13 August the royal family was imprisoned in the tower of the Temple in the Marais under conditions considerably harsher than those of their previous confinement in the Tuileries. A week later, several of the royal family's attendants, among them the Princesse de Lamballe, were taken for interrogation by the Paris Commune. Transferred to the La Force prison, after a rapid judgment, Marie Louise de Lamballe was savagely killed on 3 September. Her head was affixed on a pike and paraded through the city to the Temple for the Queen to see. Marie Antoinette was prevented from seeing it, but fainted upon learning of it. On 21 September 1792, the fall of the monarchy was officially declared and the National Convention became the governing body of the French Republic. The royal family name was downgraded to the non-royal "Capets". Preparations began for the trial of the former King in a court of law. Louis XVI's trial and execution Charged with treason against the French First Republic, Louis XVI was separated from his family and tried in December. He was found guilty by the Convention, led by the Jacobins who rejected the idea of keeping him as a hostage. On 15 January 1793, by a majority of six votes, he was condemned to death by guillotine and executed on 21 January 1793. Marie Antoinette in the Temple The former queen, now called "Widow Capet", plunged into deep mourning. She still hoped her son Louis-Charles, whom the exiled Comte de Provence, Louis XVI's brother, had recognized as Louis XVI's successor, would one day rule France. The royalists and the refractory clergy, including those preparing the insurrection in Vendée, supported Marie Antoinette and the return to the monarchy. Throughout her imprisonment and up to her execution, Marie Antoinette could count on the sympathy of conservative factions and social-religious groups which had turned against the Revolution, and also on wealthy individuals ready to bribe republican officials to facilitate her escape; these plots all failed. While imprisoned in the Tower of the Temple, Marie Antoinette, her children and