The National Constituent Assembly was formed from the National Assembly

National Assembly (French Revolution)

During the French Revolution, the National Assembly , which existed from June 17 to July 9, 1789, was a transitional body between the Estates-General and the National Constituent Assembly.-Background:...

 on 9 July 1789, during the first stages of the French Revolution

French Revolution

The French Revolution , sometimes distinguished as the 'Great French Revolution' , was a period of radical social and political upheaval in France and Europe. The absolute monarchy that had ruled France for centuries collapsed in three years...

. It dissolved on 30 September 1791 and was succeeded by the Legislative Assembly.
The Estates-General of 1789

Estates-General of 1789

The Estates-General of 1789 was the first meeting since 1614 of the French Estates-General, a general assembly representing the French estates of the realm: the nobility, the Church, and the common people...

, which convened on 5 May, had reached a deadlock in its deliberations by 6 May. The representatives of the Third Estate therefore attempted to make the whole body more effective; they met separately from 11 May as the Communes.