During the French Revolution, the Notre-Dame Cathedral in Paris experienced significant transformations that reflected the tumultuous socio-political climate of the period. As a prominent religious structure, it became a focal point for the revolutionary movement's anti-clerical sentiments. In 1793, the Notre-Dame Cathedral underwent a radical reconfiguration when the Convention (the revolutionary government) ordered the removal of its religious symbols. The cathedral's religious statues and symbols, viewed as representations of the old regime, were destroyed or defaced. The most striking alteration was the decapitation of the gallery of kings' statues (28 biblical kings on the facade) by revolutionaries who mistakenly believed these statues represented the former monarchs of France. Inside, the cathedral was stripped of its Christian artifacts and transformed into the Temple of Reason, a site dedicated to the Cult of Reason (a revolutionary belief system that promoted reason over religious faith). On 10 November 1793, the revolutionary government held the Festival of Reason within the cathedral. This event was characterized by the replacement of altars and Christian iconography with tableaux and busts celebrating the Enlightenment and rational thought. Additionally, clerics were replaced by figures such as the Goddess of Liberty, reflecting the prevailing anti-religious zeal. The Festival of Reason and subsequent ceremonies further emphasized the Revolution's efforts to de-Christianize French society while promoting secular values. By 1794, as revolutionary fervor began to wane, the Notre-Dame Cathedral faced neglect and decay. Its vast interior space was utilized as a warehouse for storing food and other supplies. Many of the cathedral's invaluable relics and treasures either disappeared or were sold off during these years. In 1795, the cult of the Supreme Being succeeded the Cult of Reason, maintaining the cathedral's secular status. Notre-Dame Cathedral underwent a process of restitution following the decade-long span of the French Revolution and associated regimes. With the Concordat of 1801 (an agreement between Napoleon Bonaparte and Pope Pius VII), the cathedral was returned to the Catholic Church. Consequently, restoration efforts began to repair the damage inflicted during the preceding years. The cathedral's use during the French Revolution highlights the extremes of the period's anti-clerical fervor and the complex interplay between religion and revolutionary ideologies.