Itinerary from the Trevi Fountain to the Pantheon

From the Trevi Fountain we head towards the Pantheon, a monument that for over two thousand years has represented the greatest expression of Rome's grandeur. Located in the Pigna district, in the heart of the historic center, the Pantheon (from the Ancient Greek Pántheon [hierón], meaning "temple of all the gods") was originally erected in 27 BC by Marcus Vipsanius Agrippa as a temple dedicated to all the deities. The current building is the result of the reconstruction commissioned by Emperor Hadrian between approximately 112 and 124 AD, made necessary after the devastating fires of 80 and 110 AD. had severely damaged the Augustan structure.

The architecture is distinguished by its majestic circular structure preceded by a pronaos with sixteen Corinthian columns: eight arranged in front and the remaining arranged in two rows of four behind. This portico supports the solemn entrance pediment. The main body, the famous Rotonda, is a circular cella surrounded by thick walls and supported by eight imposing pillars, which bear the weight of the extraordinary hemispherical concrete dome. At the center of the vault is the oculus, a circular opening that is the only source of natural light, creating evocative lighting effects inside.

An extraordinary aspect of the project is its perfect geometric balance: the height of the building, measured at the oculus, is exactly equal to the diameter of the rotunda, reflecting the classical canons of harmony and proportion. Nearly two millennia after its construction, the Pantheon's dome remains one of the largest in the world and still holds the record as the largest ever built in unreinforced Roman concrete.