Political prisoners were often held there, as were citizens detained by the authorities for trial. Some prisoners were held on the direct order of the king, from which there was no appeal. Although by the late 18th century it was little used and was scheduled to be demolished, the Bastille had come to symbolize the harsh rule of the Bourbon monarchy.
During the unrest of 1789, on July 14 a mob approached the Bastille to demand the arms and ammunition stored there, and, when the forces guarding the structure resisted, the attackers captured the prison and released the seven prisoners held there. The taking of the Bastille signaled the beginning of the French Revolution, and it thus became a symbol of the end of the ancien régime.
July 14, often called la fête nationale in France, became an official holiday in 1880. From the beginning, speeches, military parades, and fireworks, along with public revelry, were part of the celebration. The slogan “Vive le 14 juillet!” (“Long live the 14th of July!”) has continued to be associated with the day. The holiday came to be celebrated in the former French colonies and is observed in those places maintaining links to France.
French Polynesia especially came to be known for its adaptation of the holiday to its own culture, with singing, dancing, and drumming performances and competitions held throughout the month of July. In addition, Francophiles worldwide have taken up the observance of Bastille Day, celebrating with dinners of French cuisine, for example, or with concerts of French music.
The Other Events:
Celebrating 124 years of the University of Louisiana at Lafayette (July 14, 1898 - July 14, 2022)
According to britannica