At the time of the French Revolution, what was the Bastille?

Louis XIV used the Bastille as a prison for upper-class members of French society who had opposed or angered him including, after the revocation of the Edict of Nantes, French Protestants. From 1659 onwards, the Bastille functioned primarily as a state penitentiary; by 1789, 5,279 prisoners had passed through its gates. Under Louis XV and XVI, the Bastille was used to detain prisoners from more varied backgrounds, and to support the operations of the Parisian police, especially in enforcing government censorship of the printed media. Although inmates were kept in relatively good conditions, criticism of the Bastille grew during the 18th century, fueled by autobiographies written by former prisoners. Reforms were implemented and prisoner numbers were considerably reduced.

In 1789 the royal government's financial crisis and the formation of the National Assembly gave rise to a swelling of republican sentiments among city-dwellers. On 14 July the Bastille was stormed by a revolutionary crowd, primarily residents of the faubourg Saint-Antoine who sought to commandeer the valuable gunpowder held within the fortress. Seven remaining prisoners were found and released and the Bastille's governor, Bernard-René de Launay, was killed by the crowd. The Bastille was demolished by order of the Committee of the Hôtel de Ville.