On July 14, 1789, a crowd tore the Bastille apart stone by stone — and the demolition was not just symbolic. Historian Hans-Jürgen Lüsebrink, who studied the revolutionary repurposing of Parisian space, documented how the rubble was sold as souvenirs and the site was immediately redesigned as a public square. The fortress had held fewer than ten prisoners when it fell. Its power was never about incarceration. It was about what it represented: royal authority made physical. Destroying it was an architectural argument, not just a political one. While Louis XIV's architectural strategies were about monarchy, the Enlightenment's focus was on intellectual and cultural spaces that fostered public discourse. The Enlightenment flipped that logic entirely. Paris in the 18th century held roughly 600,000 people, making it Europe's second-largest city after London, and it was generating ideas that would dismantle the very regime that had built its grandest monuments. Voltaire, Rousseau, and Diderot did not work in universities or royal academies. They worked in salons and cafés, privately funded spaces that existed outside official institutions. The Palais-Royal is the clearest example of this. Its arcaded galleries, opened to the public by the Duke of Orléans in the 1780s, housed cafés, booksellers, and political clubs operating beyond royal censorship because the Palais was technically private property. On July 12, 1789 — two days before the Bastille fell — journalist Camille Desmoulins stood on a café table there and called the crowd to arms. A building designed for aristocratic leisure became the ignition point of a revolution. Architecture does not cause history, Alina, but it creates the conditions where history becomes possible. The Panthéon is the most concentrated example of how the Revolution redirected architecture toward secular public purpose. Jacques-Germain Soufflot began it in 1758 as a church dedicated to Sainte-Geneviève, patron saint of Paris; it took 34 years to complete, finishing in 1792. By then, the Revolution had already transformed it. The Constituent Assembly voted in 1791 to convert it into a mausoleum for distinguished French citizens — Voltaire and Rousseau were among the first interred. The inscription above the entrance, Aux grands hommes la patrie reconnaissante, to great men, the grateful homeland, replaced every religious dedication. A church became a secular temple to reason and civic virtue. Notre-Dame underwent a parallel, more violent transformation. During the Cult of Reason in 1793, the cathedral was briefly renamed the Temple of Reason, its Christian iconography stripped or defaced, and a festival of reason staged inside its nave. This was not vandalism without logic, Alina — it was deliberate architectural reprogramming. The Revolution understood that controlling sacred space meant controlling meaning itself. Neoclassical design, championed by figures like Jacques-Louis David, reinforced this shift: clean lines, Roman references, civic virtue over divine hierarchy. Neoclassical design, with its clean lines and Roman references, became a symbol of civic virtue and public ownership. The Enlightenment's influence on Parisian architecture was profound, with intellectual spaces like the Palais-Royal becoming centers of public discourse and cultural exchange. The Revolution inherited those open streets and filled them with new meaning: processions, public executions, festivals of the Republic. Place de la Concorde, originally built as Place Louis XV, was renamed, its royal statue removed, and the guillotine installed at its center. The same square that had framed a king's equestrian portrait became the stage for his execution in 1793. What the Enlightenment and Revolution together produced, Alina, was a fundamental reorientation of who Parisian architecture was for. Medieval Paris built upward for God. Renaissance Paris performed power for the king. The 18th century demanded something new: buildings and spaces that belonged, at least in principle, to the public. The Panthéon's secular mausoleum, the Palais-Royal's open arcades, the repurposed squares — each one was an argument that the city's stones should serve citizens, not sovereigns. That argument, made in rubble and inscription and redesigned facades, is the direct ancestor of every public library, museum, and open square Paris built in the centuries that followed.