On July 14, 1789, revolutionary insurgents in Paris attacked and seized the Bastille, a medieval fortress and state prison that symbolized royal authority. This action followed the convening of the Estates-General at Versailles on May 5 and the Tennis Court Oath on June 20. The fall of the Bastille became the defining moment that marked the beginning of the French Revolution, which would transform France politically and socially, ultimately leading to the abolition of the monarchy and establishment of a republic.