The Louvre was a prison before it was a palace. Not metaphorically — it was a fortress with a dungeon, built in 1190 to store the royal treasury and weapons while the king went on crusade. Historian Jean-Pierre Babelon, who spent decades documenting the Louvre's physical transformations, traced the exact moment the building's identity fractured: 1546, when Francis I commissioned architect Pierre Lescot to gut the medieval structure and replace it with something that had never existed in Paris before — a building designed purely to impress. While Gothic architecture was about reaching towards the divine, the Renaissance marked a shift towards human-centric designs. The focus moved from verticality to proportion, emphasizing the king's power over divine aspirations. Francis I, ruling from 1515 to 1547, was pivotal in this cultural shift, importing Italian artists and architects to Paris. He brought in Italian architects and artists, including Leonardo da Vinci, to infuse Paris with Renaissance ideals, commissioning projects like the Louvre and Hôtel de Ville. The Château d'Amboise, one of his early projects, introduced the first Renaissance pilasters in France alongside large ground-floor bays — small details that signaled a complete break from Gothic verticality. Pilasters are flat columns embedded in a wall, purely decorative, borrowed directly from Roman classical architecture. Their appearance in France meant one thing: aesthetics now had standing equal to structure. The Fontainebleau palace exemplified this shift, with Tuscan craftsman Rosso Fiorentino introducing unprecedented stucco and fresco work in 1530. The grand stairway on the oval court was modeled on a Roman triumphal arch — a deliberate reference to imperial power, not religious authority. Inside these buildings, coffered ceilings replaced ribbed vaults; classical columnar orders — Doric, Ionic, Corinthian — replaced the organic upward thrust of Gothic stone. Proportion, hierarchy, and precision became the new grammar of Parisian building. But the Renaissance didn't only transform private royal spaces, Alina. It reshaped the city's public fabric. Henri IV completed the Pont Neuf after the wars of religion — and it was revolutionary not because of its engineering, but because it had no houses on it. Every previous Parisian bridge was lined with buildings, essentially a street over water. Pont Neuf was open. You could stand on it and see the river. That sounds trivial. It wasn't. It was the first time Parisians experienced a bridge as a civic space rather than a corridor. Henri IV followed that logic directly: in 1605, he built the Place Royale — now the Place des Vosges — the first residential square in Paris designed as a unified architectural composition, with uniform facades framing an open central space. The Marais district filled with hôtels particuliers — private urban mansions — built by aristocrats who wanted to live near the new square. During this period, Francis I founded the Collège de France, promoting intellectual growth alongside architectural transformation, reflecting the Renaissance's broader cultural impact. The Mansard roof, a double-sloped design by François Mansart, emerged from this era too, solving a practical problem — how to make attic floors fully habitable — while giving Parisian rooflines their most recognizable silhouette. Here is what all of this adds up to, Alina. Medieval Paris built upward to reach God. Renaissance Paris built outward to project power. The Louvre's dungeon became a palace of classical columns. A bridge became a place to stand and breathe. A square became a stage for civic life. Every one of those changes — the pilasters, the open squares, the triumphal arches translated into staircases — was Paris consciously shedding its defensive medieval skin and replacing it with Italian-inspired aesthetics. The city stopped fortifying itself and started performing itself. That shift, from fortress to finesse, is the architectural DNA of the Paris you recognize today.