unsuccessful, including his Mémoires pour Servir à la Vie de M. de Voltaire, published posthumously, in which he also explicitly made mention of Frederick's homosexuality, when he described how the king regularly invited pages, young cadets or lieutenants from his regiment to have coffee with him and then withdrew with the favourite for a quickie. However, the correspondence between them continued, and though they never met in person again, after the Seven Years' War they largely reconciled. Geneva and Ferney Voltaire's slow progress toward Paris continued through Mainz, Mannheim, Strasbourg, and Colmar, but in January 1754 Louis XV banned him from Paris, and he turned for Geneva, near which he bought a large estate (Les Délices) in early 1755. Though he was received openly at first, the law in Geneva, which banned theatrical performances, and the publication of The Maid of Orleans against his will soured his relationship with Calvinist Genevans. In late 1758, he bought an even larger estate at Ferney, on the French side of the Franco-Swiss border. The town would adopt his name, calling itself Ferney-Voltaire, and this became its official name in 1878. Early in 1759, Voltaire completed and published Candide, ou l'Optimisme (Candide, or Optimism). This satire on Leibniz's philosophy of optimistic determinism remains Voltaire's best-known work. He would stay in Ferney for most of the remaining 20 years of his life, frequently entertaining distinguished guests, such as James Boswell, Adam Smith, Giacomo Casanova, and Edward Gibbon. In 1764, he published one of his best-known philosophical works, the Dictionnaire philosophique, a series of articles mainly on Christian history and dogmas, a few of which were originally written in Berlin. From 1762, as an unmatched intellectual celebrity, he began to champion unjustly persecuted individuals, most famously the Huguenot merchant Jean Calas. Calas had been tortured to death in 1763, supposedly because he had murdered his eldest son for wanting to convert to Catholicism. His possessions were confiscated, and his two daughters were taken from his widow and forced into Catholic convents. Voltaire, seeing this as a clear case of religious persecution, managed to overturn the conviction in 1765. Voltaire was initiated into Freemasonry a little over a month before his death. On 4 April 1778, he attended la Loge des Neuf Sœurs in Paris, and became an Entered Apprentice Freemason. According to some sources, "Benjamin Franklin ... urged Voltaire to become a freemason; and Voltaire agreed,