The Panthéon rises 83 meters above the Sainte-Geneviève mountain in Paris, a neoclassical dome that began as a church in 1758 and became the Republic's mausoleum for distinguished French citizens. You see it from blocks away, the stone façade pale against the sky. Inside, the air is cool and the scale immense—columns soar, light filters through high windows, and your footsteps echo across marble.
Architect Jacques-Germain Soufflot designed the structure, blending the lightness of Gothic engineering with classical symmetry. Construction began in 1758 and was completed in 1790 by Soufflot's pupil Jean-Baptiste Rondelet after the architect's death. In April 1791 the National Assembly designated the new church a mausoleum for distinguished citizens; the building shifted back and forth between religious and civic roles through the 19th century before its definitive transition to a secular pantheon in May 1885, when Victor Hugo was interred there.
You enter the main hall and the dome opens overhead, vast and geometric. Descend to the crypt and the temperature drops—vaulted corridors lead past stone sarcophagi, each name carved in the dim light. If you climb to the colonnade, Paris unfolds in every direction, rooftops and spires stretching to the horizon. Foucault's pendulum swings in the nave, tracing the Earth's rotation in slow, hypnotic arcs.