The Cult of Reason emerged during the French Revolution as an atheistic alternative to Christianity. Its inception can be traced to the decision of the National Convention in 1793, with a firm endorsement from radicals like Jacques Hébert and Pierre-Gaspard Chaumette. This secular ideology sought to replace traditional religious practices with the veneration of reason, science, and human intellect. The Cult of Reason's most iconic event occurred on 10 November 1793, when the cathedral of Notre-Dame in Paris was secularized and rededicated as a "Temple of Reason." This transformation involved elaborate ceremonies where Christian symbols were removed or destroyed, and altars were replaced with representations of liberty, nature, and reason. Statues, like that of the "Goddess of Reason" (often depicted by a living woman), symbolized the new belief system. Revolutionary festivals featured prominently in the Cult of Reason, with elaborate parades, music, and speeches promoting secular values. Despite its initial momentum, the Cult of Reason faced criticism and competition from other revolutionary ideologies. One notable rival was the Cult of the Supreme Being, championed by Maximilien Robespierre as a deistic counterpart. This competition reflected broader tensions within revolutionary France regarding the role of religion and the state. The official promotion of the Cult of Reason was relatively short-lived. After Robespierre's fall (28 July 1794), many of the revolutionary religious policies were rolled back or abandoned. The Thermidorian Reaction marked a return to more traditional religious practices, effectively ending the public support for the Cult of Reason. However, its brief existence highlighted the revolutionaries' attempt to reshape French society's cultural and moral foundations.