The National Constituent Assembly (Assemblée nationale constituante) was a crucial body during the early stages of the French Revolution. Created on 9 July 1789 from the Estates-General, it assumed the role of drafting a new constitution for France. The transformation from Estates-General to National Constituent Assembly represented a shift in power, as it marked the end of the traditional structure that granted significant privileges to the First (clergy) and Second (nobility) Estates. Among its notable achievements was the adoption of the Declaration of the Rights of Man and of the Citizen (Déclaration des droits de l'homme et du citoyen) on 26 August 1789. This document, heavily influenced by Enlightenment ideas, proclaimed fundamental human rights such as liberty, property, security, and resistance to oppression. It became a cornerstone for future legal and political frameworks. The National Constituent Assembly also undertook substantial reforms to address fiscal crises and social inequalities. By nationalizing church lands (2 November 1789), it attempted to alleviate state debts and subsequently issued assignats (a form of paper currency) backed by these lands. Additionally, the Assembly enacted the Civil Constitution of the Clergy on 12 July 1790, which sought to reorganize the Roman Catholic Church in France by making clergy paid state officials. This measure significantly reduced the Church's influence but also created deep divisions among the population. Another significant action was the reorganization of administrative structures. The Assembly abolished feudal privileges and established a new system of départements on 4 March 1790, replacing the provinces. These administrative divisions aimed to create a more rational and uniform government structure and were designed to facilitate local governance. Despite these reforms, the National Constituent Assembly faced significant challenges. Internal conflicts, external pressures (such as threats from foreign monarchies), and economic difficulties created an atmosphere of unrest. The Flight to Varennes (20-21 June 1791), where King Louis XVI attempted to flee Paris, further exacerbated the crisis by undermining confidence in the monarchy's commitment to the new constitutional order. The Assembly dissolved itself on 30 September 1791, succeeded by the Legislative Assembly. This marked a transition from the initial revolutionary phase to a period of more radical reforms and increasing social upheaval. The body’s legacy, however, lay in setting the foundation for modern French governance and inspiring other nations struggling for democratic reforms.