The porch of the Pantheon

This sketch captures the massive bronze doors and the coffered barrel vault of the Pantheon's pronaos. Detailed fluted pilasters with Corinthian capitals frame the entrance, while a separate detail at the bottom shows an ornamental candelabra relief. Handwritten notes in Italian identify the structure as the 'Ritonda' or Rotunda.

To Renaissance thinkers like Raphael, the Pantheon was the ultimate expression of cosmic harmony and divine geometry, embodying the Neoplatonic ideal of the circle and square. Its architecture was studied as a physical manifestation of ancient wisdom (prisca sapientia) and the mathematical laws underlying the natural world.