In his native Paris, Voltaire was remembered as the defender of Jean Calas and Pierre Sirven. Although Voltaire's campaign had failed to secure the annulment of la Barre's execution for blasphemy against Christianity, the criminal code that sanctioned the execution was revised during Voltaire's lifetime. In 1764, Voltaire successfully intervened and secured the release of Claude Chamont, arrested for attending Protestant services. When Comte de Lally was executed for treason in 1766, Voltaire wrote a 300-page document in his defense. Subsequently, in 1778, the judgment against de Lally was expunged just before Voltaire's death. The Genevan Protestant minister Pomaret once said to Voltaire, "You seem to attack Christianity, and yet you do the work of a Christian." Frederick the Great noted the significance of a philosopher capable of influencing judges to change their unjust decisions, commenting that this alone is sufficient to ensure the prominence of Voltaire as a humanitarian.