The Bastille was a fortress-prison in Paris, known formally as Bastille Saint-Antoine—Number 232, Rue Saint-Antoine—best known today because of the storming of the Bastille on 14 July 1789, which along with the Tennis Court Oath is considered the beginning of the French Revolution.
The event was commemorated one year later by the Fête de la Fédération. The French national holiday, celebrated annually on 14 July is officially the Fête Nationale, and officially commemorates the Fête de la Fédération, but it is commonly known in English as Bastille Day. Bastille is a French word meaning 'castle' or 'stronghold', or 'bastion'; used with a definite article (la Bastille in French, the Bastille in English), it refers to the prison.