Porta Diana, Etruscan city gate in Volterra, Italy

Porta Diana, also called il Portone, is a city gate on the north side of Volterra, beyond the town cemetery on the slope toward the Valdelsa. It was one of at least three main gates of the Etruscan wall circuit in pietra panchina, marking the end of the cardo maximus. Only the two side jambs remain; the covering was of wood.

The gate was built between the 3rd and 2nd centuries BCE as part of the Etruscan fortification system that protected ancient Volterra. The structure has survived centuries and still displays the original Etruscan building techniques.

The name Diana is a modern label; the sources do not record any dedication to the goddess. The gate marked the end of the cardo maximus, the main north-south street, and from here the road left towards the Valdera and Valdarno. Beyond it lies the Portone necropolis, the largest in Volterra, used from the Iron Age to the imperial period.

The gate lies north of the city center and can be reached by walking paths from downtown Volterra. Parking is available near the cemetery, and the path to the site is flat and accessible for most visitors.

Beyond the gate lies the Portone necropolis, the largest in Volterra, spread over Luoghino, Lecceto, Osteriaccia, Le Vigne and I Marmini. Its tombs were used from the Iron Age to the imperial era, with the densest burials in the Hellenistic period.